diff --git a/projects/plugins/jetpack/changelog/rm-sso-legacy-code b/projects/plugins/jetpack/changelog/rm-sso-legacy-code
new file mode 100644
index 0000000000000..741e9967c09c1
--- /dev/null
+++ b/projects/plugins/jetpack/changelog/rm-sso-legacy-code
@@ -0,0 +1,4 @@
+Significance: patch
+Type: enhancement
+
+SSO: remove legacy codebase in favor of the newer SSO codebase introduced in Jetpack 13.5
diff --git a/projects/plugins/jetpack/modules/sso.php b/projects/plugins/jetpack/modules/sso.php
index d2285b680404a..6f2d6f56629fd 100644
--- a/projects/plugins/jetpack/modules/sso.php
+++ b/projects/plugins/jetpack/modules/sso.php
@@ -25,10 +25,3 @@ function () {
 		Jetpack::enable_module_configurable( __FILE__ );
 	}
 );
-
-/**
- * Legacy, deprecated class.
- *
- * @deprecated 13.5
- */
-class Jetpack_SSO extends SSO {}
diff --git a/projects/plugins/jetpack/modules/sso/class-jetpack-force-2fa.php b/projects/plugins/jetpack/modules/sso/class-jetpack-force-2fa.php
deleted file mode 100644
index 422f4b543d0f6..0000000000000
--- a/projects/plugins/jetpack/modules/sso/class-jetpack-force-2fa.php
+++ /dev/null
@@ -1,70 +0,0 @@
-<?php
-/**
- * Force Jetpack 2FA Functionality
- *
- * Ported from original repo at https://github.com/automattic/jetpack-force-2fa
- *
- * @deprecated 13.5 Use Automattic\Jetpack\Connection\Manager\SSO instead.
- *
- * phpcs:disable VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
- *
- * @package automattic/jetpack
- */
-
-/**
- * Force users to use two factor authentication.
- *
- * @deprecated 13.5
- */
-class Jetpack_Force_2FA {
-
-	/**
-	 * The role to force 2FA for.
-	 *
-	 * Defaults to manage_options via the plugins_loaded function.
-	 * Can be modified with the jetpack_force_2fa_cap filter.
-	 *
-	 * @deprecated 13.5
-	 *
-	 * @var string
-	 */
-	private $role;
-
-	/**
-	 * Constructor.
-	 *
-	 * @deprecated 13.5
-	 */
-	public function __construct() {
-		_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\Manager\\SSO\\Force_2FA::__construct' );
-	}
-
-	/**
-	 * Load the plugin via the plugins_loaded hook.
-	 *
-	 * @deprecated 13.5
-	 */
-	public function plugins_loaded() {
-		_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\Manager\\SSO\\Force_2FA::plugins_loaded' );
-	}
-
-	/**
-	 * Display an admin notice if Jetpack SSO is not active.
-	 *
-	 * @deprecated 13.5
-	 */
-	public function admin_notice() {
-		_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\Manager\\SSO\\Force_2FA::admin_notice' );
-	}
-
-	/**
-	 * Specifically set the two step filter for Jetpack SSO.
-	 *
-	 * @deprecated 13.5
-	 *
-	 * @param Object $user_data The user data from WordPress.com.
-	 */
-	public function jetpack_set_two_step( $user_data ) {
-		_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\Manager\\SSO\\Force_2FA::jetpack_set_two_step' );
-	}
-}
diff --git a/projects/plugins/jetpack/modules/sso/class.jetpack-sso-helpers.php b/projects/plugins/jetpack/modules/sso/class.jetpack-sso-helpers.php
deleted file mode 100644
index 816a792e93914..0000000000000
--- a/projects/plugins/jetpack/modules/sso/class.jetpack-sso-helpers.php
+++ /dev/null
@@ -1,277 +0,0 @@
-<?php // phpcs:ignore WordPress.Files.FileName.InvalidClassFileName
-/**
- * A collection of helper functions used in the SSO module.
- *
- * @deprecated 13.5 Use Automattic\Jetpack\Connection\Manager\SSO instead.
- *
- * @package automattic/jetpack
- */
-
-use Automattic\Jetpack\Connection\Manager;
-use Automattic\Jetpack\Connection\SSO\Helpers;
-use Automattic\Jetpack\Connection\Utils;
-
-if ( ! class_exists( 'Jetpack_SSO_Helpers' ) ) :
-
-	/**
-	 * A collection of helper functions used in the SSO module.
-	 *
-	 * @deprecated 13.5
-	 *
-	 * @since 4.1.0
-	 */
-	class Jetpack_SSO_Helpers {
-		/**
-		 * Determine if the login form should be hidden or not
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @return bool
-		 **/
-		public static function should_hide_login_form() {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\Helpers::should_hide_login_form' );
-
-			return Helpers::should_hide_login_form();
-		}
-
-		/**
-		 * Returns a boolean value for whether logging in by matching the WordPress.com user email to a
-		 * Jetpack site user's email is allowed.
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @return bool
-		 */
-		public static function match_by_email() {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\Helpers::match_by_email' );
-
-			return Helpers::match_by_email();
-		}
-
-		/**
-		 * Returns a boolean for whether users are allowed to register on the Jetpack site with SSO,
-		 * even though the site disallows normal registrations.
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param object|null $user_data WordPress.com user information.
-		 * @return bool
-		 */
-		public static function new_user_override( $user_data = null ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\Helpers::new_user_override' );
-
-			return Helpers::new_user_override( $user_data );
-		}
-
-		/**
-		 * Returns a boolean value for whether two-step authentication is required for SSO.
-		 *
-		 * @since 4.1.0
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @return bool
-		 */
-		public static function is_two_step_required() {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\Helpers::is_two_step_required' );
-
-			return Helpers::is_two_step_required();
-		}
-
-		/**
-		 * Returns a boolean for whether a user that is attempting to log in will be automatically
-		 * redirected to WordPress.com to begin the SSO flow.
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @return bool
-		 */
-		public static function bypass_login_forward_wpcom() {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\Helpers::bypass_login_forward_wpcom' );
-
-			return Helpers::bypass_login_forward_wpcom();
-		}
-
-		/**
-		 * Returns a boolean for whether the SSO login form should be displayed as the default
-		 * when both the default and SSO login form allowed.
-		 *
-		 * @since 4.1.0
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @return bool
-		 */
-		public static function show_sso_login() {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\Helpers::show_sso_login' );
-
-			return Helpers::show_sso_login();
-		}
-
-		/**
-		 * Returns a boolean for whether the two step required checkbox, displayed on the Jetpack admin page, should be disabled.
-		 *
-		 * @since 4.1.0
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @return bool
-		 */
-		public static function is_require_two_step_checkbox_disabled() {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\Helpers::is_require_two_step_checkbox_disabled' );
-
-			return Helpers::is_require_two_step_checkbox_disabled();
-		}
-
-		/**
-		 * Returns a boolean for whether the match by email checkbox, displayed on the Jetpack admin page, should be disabled.
-		 *
-		 * @since 4.1.0
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @return bool
-		 */
-		public static function is_match_by_email_checkbox_disabled() {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\Helpers::is_match_by_email_checkbox_disabled' );
-
-			return Helpers::is_match_by_email_checkbox_disabled();
-		}
-
-		/**
-		 * Returns an array of hosts that SSO will redirect to.
-		 *
-		 * Instead of accessing JETPACK__API_BASE within the method directly, we set it as the
-		 * default for $api_base due to restrictions with testing constants in our tests.
-		 *
-		 * @since 4.3.0
-		 * @since 4.6.0 Added public-api.wordpress.com as an allowed redirect
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param array  $hosts Allowed redirect hosts.
-		 * @param string $api_base Base API URL.
-		 *
-		 * @return array
-		 */
-		public static function allowed_redirect_hosts( $hosts, $api_base = JETPACK__API_BASE ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\Helpers::allowed_redirect_hosts' );
-
-			return Helpers::allowed_redirect_hosts( $hosts, $api_base );
-		}
-
-		/**
-		 * Generate a new user from a SSO attempt.
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param object $user_data WordPress.com user information.
-		 */
-		public static function generate_user( $user_data ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\Utils::generate_user' );
-
-			return Utils::generate_user( $user_data );
-		}
-
-		/**
-		 * Determines how long the auth cookie is valid for when a user logs in with SSO.
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @return int result of the jetpack_sso_auth_cookie_expiration filter.
-		 */
-		public static function extend_auth_cookie_expiration_for_sso() {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\Helpers::extend_auth_cookie_expiration_for_sso' );
-
-			return Helpers::extend_auth_cookie_expiration_for_sso();
-		}
-
-		/**
-		 * Determines if the SSO form should be displayed for the current action.
-		 *
-		 * @since 4.6.0
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param string $action SSO action being performed.
-		 *
-		 * @return bool  Is SSO allowed for the current action?
-		 */
-		public static function display_sso_form_for_action( $action ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\Helpers::display_sso_form_for_action' );
-
-			return Helpers::display_sso_form_for_action( $action );
-		}
-
-		/**
-		 * This method returns an environment array that is meant to simulate `$_REQUEST` when the initial
-		 * JSON API auth request was made.
-		 *
-		 * @since 4.6.0
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @return array|bool
-		 */
-		public static function get_json_api_auth_environment() {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\Helpers::get_json_api_auth_environment' );
-
-			return Helpers::get_json_api_auth_environment();
-		}
-
-		/**
-		 * Check if the site has a custom login page URL, and return it.
-		 * If default login page URL is used (`wp-login.php`), `null` will be returned.
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @return string|null
-		 */
-		public static function get_custom_login_url() {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\Helpers::get_custom_login_url' );
-
-			return Helpers::get_custom_login_url();
-		}
-
-		/**
-		 * Clear the cookies that store the profile information for the last
-		 * WPCOM user to connect.
-		 *
-		 * @deprecated 13.5
-		 */
-		public static function clear_wpcom_profile_cookies() {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\Helpers::clear_wpcom_profile_cookies' );
-
-			return Helpers::clear_wpcom_profile_cookies();
-		}
-
-		/**
-		 * Remove an SSO connection for a user.
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param int $user_id The local user id.
-		 */
-		public static function delete_connection_for_user( $user_id ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\Helpers::delete_connection_for_user' );
-
-			return Helpers::delete_connection_for_user( $user_id );
-		}
-
-		/**
-		 * Check if a local user is already connected to WordPress.com.
-		 *
-		 * @since 13.3
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param int $user_id Local User information.
-		 */
-		public static function is_user_connected( $user_id = 0 ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\Manager->is_user_connected' );
-
-			return ( new Manager() )->is_user_connected( $user_id );
-		}
-	}
-
-endif;
diff --git a/projects/plugins/jetpack/modules/sso/class.jetpack-sso-notices.php b/projects/plugins/jetpack/modules/sso/class.jetpack-sso-notices.php
deleted file mode 100644
index 7210ed4ae28da..0000000000000
--- a/projects/plugins/jetpack/modules/sso/class.jetpack-sso-notices.php
+++ /dev/null
@@ -1,188 +0,0 @@
-<?php // phpcs:ignore WordPress.Files.FileName.InvalidClassFileName
-/**
- * A collection of helper functions used in the SSO module.
- *
- * @deprecated 13.5 Use Automattic\Jetpack\Connection\Manager\SSO instead.
- *
- * @package automattic/jetpack
- */
-
-use Automattic\Jetpack\Connection\SSO\Notices;
-
-if ( ! class_exists( 'Jetpack_SSO_Notices' ) ) :
-
-	/**
-	 * A collection of helper functions used in the SSO module.
-	 *
-	 * @deprecated 13.5
-	 *
-	 * @since 4.4.0
-	 */
-	class Jetpack_SSO_Notices {
-		/**
-		 * Error message displayed on the login form when two step is required and
-		 * the user's account on WordPress.com does not have two step enabled.
-		 *
-		 * @since 2.7
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param string $message Error message.
-		 * @return string
-		 **/
-		public static function error_msg_enable_two_step( $message ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\Manager\\SSO\\Notices::error_msg_enable_two_step' );
-
-			return Notices::error_msg_enable_two_step( $message );
-		}
-
-		/**
-		 * Error message displayed when the user tries to SSO, but match by email
-		 * is off and they already have an account with their email address on
-		 * this site.
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param string $message Error message.
-		 * @return string
-		 */
-		public static function error_msg_email_already_exists( $message ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\Manager\\SSO\\Notices::error_msg_email_already_exists' );
-
-			return Notices::error_msg_email_already_exists( $message );
-		}
-
-		/**
-		 * Error message that is displayed when the current site is in an identity crisis and SSO can not be used.
-		 *
-		 * @since 4.3.2
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param string $message Error Message.
-		 *
-		 * @return string
-		 */
-		public static function error_msg_identity_crisis( $message ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\Manager\\SSO\\Notices::error_msg_identity_crisis' );
-
-			return Notices::error_msg_identity_crisis( $message );
-		}
-
-		/**
-		 * Error message that is displayed when we are not able to verify the SSO nonce due to an XML error or
-		 * failed validation. In either case, we prompt the user to try again or log in with username and password.
-		 *
-		 * @since 4.3.2
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param string $message Error message.
-		 *
-		 * @return string
-		 */
-		public static function error_invalid_response_data( $message ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\Manager\\SSO\\Notices::error_invalid_response_data' );
-
-			return Notices::error_invalid_response_data( $message );
-		}
-
-		/**
-		 * Error message that is displayed when we were not able to automatically create an account for a user
-		 * after a user has logged in via SSO. By default, this message is triggered after trying to create an account 5 times.
-		 *
-		 * @since 4.3.2
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param string $message Error message.
-		 *
-		 * @return string
-		 */
-		public static function error_unable_to_create_user( $message ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\Manager\\SSO\\Notices::error_unable_to_create_user' );
-
-			return Notices::error_unable_to_create_user( $message );
-		}
-
-		/**
-		 * When the default login form is hidden, this method is called on the 'authenticate' filter with a priority of 30.
-		 * This method disables the ability to submit the default login form.
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param WP_User|WP_Error $user Either the user attempting to login or an existing authentication failure.
-		 *
-		 * @return WP_Error
-		 */
-		public static function disable_default_login_form( $user ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\Manager\\SSO\\Notices::disable_default_login_form' );
-
-			return Notices::disable_default_login_form( $user );
-		}
-
-		/**
-		 * Message displayed when the site admin has disabled the default WordPress
-		 * login form in Settings > General > Secure Sign On
-		 *
-		 * @since 2.7
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param string $message Error message.
-		 *
-		 * @return string
-		 **/
-		public static function msg_login_by_jetpack( $message ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\Manager\\SSO\\Notices::msg_login_by_jetpack' );
-
-			return Notices::msg_login_by_jetpack( $message );
-		}
-
-		/**
-		 * Get the message for SSO required.
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @return string
-		 */
-		public static function get_sso_required_message() {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\Manager\\SSO\\Notices::get_sso_required_message' );
-
-			return Notices::get_sso_required_message();
-		}
-
-		/**
-		 * Message displayed when the user can not be found after approving the SSO process on WordPress.com
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param string $message Error message.
-		 *
-		 * @return string
-		 */
-		public static function cant_find_user( $message ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\Manager\\SSO\\Notices::cant_find_user' );
-
-			return Notices::cant_find_user( $message );
-		}
-
-		/**
-		 * Error message that is displayed when the current site is in an identity crisis and SSO can not be used.
-		 *
-		 * @since 4.4.0
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param string $message Error message.
-		 *
-		 * @return string
-		 */
-		public static function sso_not_allowed_in_staging( $message ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\Manager\\SSO\\Notices::sso_not_allowed_in_staging' );
-			// @phan-suppress-next-line PhanDeprecatedFunction
-			return Notices::sso_not_allowed_in_staging( $message );
-		}
-	}
-
-endif;
diff --git a/projects/plugins/jetpack/modules/sso/class.jetpack-sso-user-admin.php b/projects/plugins/jetpack/modules/sso/class.jetpack-sso-user-admin.php
deleted file mode 100644
index c3e5aa4c9e3d5..0000000000000
--- a/projects/plugins/jetpack/modules/sso/class.jetpack-sso-user-admin.php
+++ /dev/null
@@ -1,254 +0,0 @@
-<?php // phpcs:ignore WordPress.Files.FileName.InvalidClassFileName
-/**
- * Extra UI elements added to the User Menu for the SSO feature.
- *
- * @deprecated 13.5 Use Automattic\Jetpack\Connection\Manager\SSO instead.
- *
- * phpcs:disable VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
- *
- * @package automattic/jetpack
- */
-
-if ( ! class_exists( 'Jetpack_SSO_User_Admin' ) ) :
-	/**
-	 * Jetpack sso user admin class.
-	 *
-	 * @deprecated 13.5
-	 */
-	class Jetpack_SSO_User_Admin {
-		/**
-		 * Constructor function.
-		 *
-		 * @deprecated 13.5
-		 */
-		public function __construct() {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\User_Admin' );
-		}
-
-		/**
-		 * Enqueue assets for user-new.php.
-		 *
-		 * @deprecated 13.5
-		 */
-		public function jetpack_new_users_styles() {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\User_Admin->jetpack_new_users_styles' );
-		}
-
-		/**
-		 * Intercept the arguments for building the table, and create WP_User_Query instance
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param array $args The search arguments.
-		 */
-		public function set_user_query( $args ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\User_Admin->set_user_query' );
-		}
-
-		/**
-		 * Revokes WordPress.com invitation.
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param int $user_id The user ID.
-		 */
-		public function revoke_user_invite( $user_id ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\User_Admin->revoke_user_invite' );
-		}
-
-		/**
-		 * Renders invitations errors/success messages in users.php.
-		 *
-		 * @deprecated 13.5
-		 */
-		public function handle_invitation_results() {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\User_Admin->handle_invitation_results' );
-		}
-
-		/**
-		 * Invites a user to connect to WordPress.com to allow them to log in via SSO.
-		 *
-		 * @deprecated 13.5
-		 */
-		public function invite_user_to_wpcom() {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\User_Admin->invite_user_to_wpcom' );
-		}
-
-		/**
-		 * Revokes a user's invitation to connect to WordPress.com.
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param string $invite_id The ID of the invite to revoke.
-		 */
-		public function send_revoke_wpcom_invite( $invite_id ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\User_Admin->send_revoke_wpcom_invite' );
-		}
-
-		/**
-		 * Handles logic to revoke user invite.
-		 *
-		 * @deprecated 13.5
-		 */
-		public function handle_request_revoke_invite() {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\User_Admin->handle_request_revoke_invite' );
-		}
-
-		/**
-		 * Handles resend user invite.
-		 *
-		 * @deprecated 13.5
-		 */
-		public function handle_request_resend_invite() {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\User_Admin->handle_request_resend_invite' );
-		}
-
-		/**
-		 * Adds 'Revoke invite' and 'Resend invite' link to user table row actions.
-		 * Removes 'Reset password' link.
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param array   $actions - User row actions.
-		 * @param WP_User $user_object - User object.
-		 */
-		public function jetpack_user_table_row_actions( $actions, $user_object ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\User_Admin->jetpack_user_table_row_actions' );
-		}
-
-		/**
-		 * Render the invitation email message.
-		 *
-		 * @deprecated 13.5
-		 */
-		public function render_invitation_email_message() {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\User_Admin->render_invitation_email_message' );
-		}
-
-		/**
-		 * Render a note that wp.com invites will be automatically revoked.
-		 *
-		 * @deprecated 13.5
-		 */
-		public function render_invitations_notices_for_deleted_users() {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\User_Admin->render_invitations_notices_for_deleted_users' );
-		}
-
-		/**
-		 * Render WordPress.com invite checkbox for new user registration.
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param string $type The type of new user form the hook follows.
-		 */
-		public function render_wpcom_invite_checkbox( $type ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\User_Admin->render_wpcom_invite_checkbox' );
-		}
-
-		/**
-		 * Render a checkbox to differentiate if a user is external.
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param string $type The type of new user form the hook follows.
-		 */
-		public function render_wpcom_external_user_checkbox( $type ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\User_Admin->render_wpcom_external_user_checkbox' );
-		}
-
-		/**
-		 * Render the custom email message form field for new user registration.
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param string $type The type of new user form the hook follows.
-		 */
-		public function render_custom_email_message_form_field( $type ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\User_Admin->render_custom_email_message_form_field' );
-		}
-
-		/**
-		 * Conditionally disable the core invitation email.
-		 * It should be sent when SSO is disabled or when admins opt-out of WordPress.com invites intentionally.
-		 * If the "Send User Notification" checkbox is checked, the core invitation email should be sent.
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param boolean $send_wp_email Whether the core invitation email should be sent.
-		 */
-		public function should_send_wp_mail_new_user( $send_wp_email ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\User_Admin->should_send_wp_mail_new_user' );
-		}
-
-		/**
-		 * Send user invitation to WordPress.com if user has no errors.
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param WP_Error $errors The WP_Error object.
-		 * @param bool     $update Whether the user is being updated or not.
-		 * @param stdClass $user   The User object about to be created.
-		 */
-		public function send_wpcom_mail_user_invite( $errors, $update, $user ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\User_Admin->send_wpcom_mail_user_invite' );
-		}
-
-		/**
-		 * Adds a column in the user admin table to display user connection status and actions.
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param array $columns User list table columns.
-		 */
-		public function jetpack_user_connected_th( $columns ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\User_Admin->jetpack_user_connected_th' );
-		}
-
-		/**
-		 * Check if there is cached invite for a user email.
-		 *
-		 * @access private
-		 * @static
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param string $email The user email.
-		 */
-		public static function get_pending_cached_wpcom_invite( $email ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\User_Admin->get_pending_cached_wpcom_invite' );
-		}
-
-		/**
-		 * Show Jetpack SSO user connection status.
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param string $val HTML for the column.
-		 * @param string $col User list table column.
-		 * @param int    $user_id User ID.
-		 */
-		public function jetpack_show_connection_status( $val, $col, $user_id ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\User_Admin->jetpack_show_connection_status' );
-		}
-
-		/**
-		 * Creates error notices and redirects the user to the previous page.
-		 *
-		 * @deprecated 13.5
-		 *
-		 * @param array $query_params - query parameters added to redirection URL.
-		 */
-		public function create_error_notice_and_redirect( $query_params ) {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\User_Admin->create_error_notice_and_redirect' );
-		}
-
-		/**
-		 * Style the Jetpack user rows and columns.
-		 *
-		 * @deprecated 13.5
-		 */
-		public function jetpack_user_table_styles() {
-			_deprecated_function( __METHOD__, 'jetpack-13.5', 'Automattic\\Jetpack\\Connection\\SSO\\User_Admin->jetpack_user_table_styles' );
-		}
-	}
-endif;
diff --git a/projects/plugins/jetpack/modules/sso/jetpack-sso-admin-create-user.css b/projects/plugins/jetpack/modules/sso/jetpack-sso-admin-create-user.css
deleted file mode 100644
index 5a4c345238360..0000000000000
--- a/projects/plugins/jetpack/modules/sso/jetpack-sso-admin-create-user.css
+++ /dev/null
@@ -1,22 +0,0 @@
-
-.jetpack-sso-admin-create-user-invite-message {
-	width: 550px;
-}
-
-.jetpack-sso-admin-create-user-invite-message-link-sso {
-    text-decoration: none;
-}
-
-#createuser .form-field textarea {
-	width: 25em;
-}
-
-#createuser .form-field [type=checkbox] {
-	width: 1rem;
-}
-
-#custom_email_message_description {
-	max-width: 25rem;
-	color: #646970;
-	font-size: 12px;
-}
diff --git a/projects/plugins/jetpack/modules/sso/jetpack-sso-admin-create-user.js b/projects/plugins/jetpack/modules/sso/jetpack-sso-admin-create-user.js
deleted file mode 100644
index 0c8449c78c931..0000000000000
--- a/projects/plugins/jetpack/modules/sso/jetpack-sso-admin-create-user.js
+++ /dev/null
@@ -1,45 +0,0 @@
-document.addEventListener( 'DOMContentLoaded', function () {
-	const sendUserNotificationCheckbox = document.getElementById( 'send_user_notification' );
-	const userExternalContractorCheckbox = document.getElementById( 'user_external_contractor' );
-	const inviteUserWpcomCheckbox = document.getElementById( 'invite_user_wpcom' );
-	const customEmailMessageBlock = document.getElementById( 'custom_email_message_block' );
-
-	if ( inviteUserWpcomCheckbox && sendUserNotificationCheckbox && customEmailMessageBlock ) {
-		// Toggle Send User Notification checkbox enabled/disabled based on Invite User checkbox
-		// Enable External Contractor checkbox if Invite User checkbox is checked
-		// Show/hide the external email message field.
-		inviteUserWpcomCheckbox.addEventListener( 'change', function () {
-			sendUserNotificationCheckbox.disabled = inviteUserWpcomCheckbox.checked;
-			if ( inviteUserWpcomCheckbox.checked ) {
-				sendUserNotificationCheckbox.checked = false;
-				if ( userExternalContractorCheckbox ) {
-					userExternalContractorCheckbox.disabled = false;
-				}
-				customEmailMessageBlock.style.display = 'table';
-			} else {
-				if ( userExternalContractorCheckbox ) {
-					userExternalContractorCheckbox.disabled = true;
-					userExternalContractorCheckbox.checked = false;
-				}
-				customEmailMessageBlock.style.display = 'none';
-			}
-		} );
-
-		// On load, disable Send User Notification checkbox
-		// and show the custom email message if Invite User checkbox is checked
-		if ( inviteUserWpcomCheckbox.checked ) {
-			sendUserNotificationCheckbox.disabled = true;
-			sendUserNotificationCheckbox.checked = false;
-			customEmailMessageBlock.style.display = 'table';
-		}
-
-		// On load, disable External Contractor checkbox
-		// and hide the custom email message if Invite User checkbox is unchecked
-		if ( ! inviteUserWpcomCheckbox.checked ) {
-			if ( userExternalContractorCheckbox ) {
-				userExternalContractorCheckbox.disabled = true;
-			}
-			customEmailMessageBlock.style.display = 'none';
-		}
-	}
-} );
diff --git a/projects/plugins/jetpack/modules/sso/jetpack-sso-login.css b/projects/plugins/jetpack/modules/sso/jetpack-sso-login.css
deleted file mode 100644
index 167c0ff1c11af..0000000000000
--- a/projects/plugins/jetpack/modules/sso/jetpack-sso-login.css
+++ /dev/null
@@ -1,163 +0,0 @@
-#loginform {
-	/* We set !important because sometimes static is added inline */
-	position: relative !important;
-	padding-bottom: 92px;
-}
-
-.jetpack-sso-repositioned #loginform {
-	padding-bottom: 26px;
-}
-
-#loginform #jetpack-sso-wrap,
-#loginform #jetpack-sso-wrap * {
-	box-sizing: border-box;
-}
-
-
-#jetpack-sso-wrap__action,
-#jetpack-sso-wrap__user{
-	display: none;
-}
-
-.jetpack-sso-form-display #jetpack-sso-wrap__action,
-.jetpack-sso-form-display #jetpack-sso-wrap__user {
-	display: block;
-}
-
-#jetpack-sso-wrap {
-	position: absolute;
-		bottom: 20px;
-	padding: 0 24px;
-	margin-left: -24px;
-	margin-right: -24px;
-	width: 100%;
-}
-
-.jetpack-sso-repositioned #jetpack-sso-wrap {
-	position: relative;
-		bottom: auto;
-	padding: 0;
-	margin-top: 16px;
-	margin-left: 0;
-	margin-right: 0;
-}
-
-.jetpack-sso-form-display #jetpack-sso-wrap {
-	position: relative;
-		bottom: auto;
-	padding: 0;
-	margin-top: 0;
-	margin-left: 0;
-	margin-right: 0;
-}
-
-#loginform #jetpack-sso-wrap p {
-	color: #777777;
-	margin-bottom: 16px;
-}
-
-#jetpack-sso-wrap a {
-	display: block;
-	width: 100%;
-	text-align: center;
-	text-decoration: none;
-}
-
-#jetpack-sso-wrap .jetpack-sso-toggle.wpcom {
-	display: none;
-}
-
-.jetpack-sso-form-display #jetpack-sso-wrap .jetpack-sso-toggle.wpcom {
-	display: block;
-}
-
-
-.jetpack-sso-form-display #jetpack-sso-wrap .jetpack-sso-toggle.default {
-	display: none;
-}
-
-
-.jetpack-sso-form-display #loginform > p,
-.jetpack-sso-form-display #loginform > div {
-	display: none;
-}
-
-.jetpack-sso-form-display #loginform #jetpack-sso-wrap {
-	display: block;
-}
-
-.jetpack-sso-form-display #loginform {
-	padding: 26px 24px;
-}
-
-.jetpack-sso-or {
-	margin-bottom: 16px;
-	position: relative;
-	text-align: center;
-}
-
-.jetpack-sso-or:before {
-	background: #dcdcde;
-	content: '';
-	height: 1px;
-	position: absolute;
-		left: 0;
-		top: 50%;
-	width: 100%;
-}
-.jetpack-sso-or span {
-	background: #fff;
-	color: #777;
-	position: relative;
-	padding: 0 8px;
-	text-transform: uppercase
-}
-
-#jetpack-sso-wrap .button {
-	display: flex;
-	justify-content: center;
-	align-items: center;
-	height: 36px;
-	margin-bottom: 16px;
-	width: 100%;
-}
-
-#jetpack-sso-wrap .button .genericon-wordpress {
-	font-size: 24px;
-	margin-right: 4px;
-}
-
-#jetpack-sso-wrap__user img {
-	border-radius: 50%;
-	display: block;
-	margin: 0 auto 16px;
-}
-
-#jetpack-sso-wrap__user h2 {
-	font-size: 21px;
-	font-weight: 300;
-	margin-bottom: 16px;
-	text-align: center;
-}
-
-#jetpack-sso-wrap__user h2 span {
-	font-weight: bold;
-}
-
-.jetpack-sso-wrap__reauth {
-	margin-bottom: 16px;
-}
-
-.jetpack-sso-form-display #nav {
-	display: none;
-}
-
-.jetpack-sso-form-display #backtoblog {
-	margin: 24px 0 0;
-}
-
-.jetpack-sso-clear:after {
-	content: "";
-	display: table;
-	clear: both;
-}
diff --git a/projects/plugins/jetpack/modules/sso/jetpack-sso-login.js b/projects/plugins/jetpack/modules/sso/jetpack-sso-login.js
deleted file mode 100644
index 980741be20c42..0000000000000
--- a/projects/plugins/jetpack/modules/sso/jetpack-sso-login.js
+++ /dev/null
@@ -1,27 +0,0 @@
-document.addEventListener( 'DOMContentLoaded', () => {
-	const body = document.querySelector( 'body' ),
-		toggleSSO = document.querySelector( '.jetpack-sso-toggle' ),
-		userLogin = document.getElementById( 'user_login' ),
-		userPassword = document.getElementById( 'user_pass' ),
-		ssoWrap = document.getElementById( 'jetpack-sso-wrap' ),
-		loginForm = document.getElementById( 'loginform' ),
-		overflow = document.createElement( 'div' );
-
-	overflow.className = 'jetpack-sso-clear';
-
-	loginForm.appendChild( overflow );
-	overflow.appendChild( document.querySelector( 'p.forgetmenot' ) );
-	overflow.appendChild( document.querySelector( 'p.submit' ) );
-
-	loginForm.appendChild( ssoWrap );
-	body.classList.add( 'jetpack-sso-repositioned' );
-
-	toggleSSO.addEventListener( 'click', e => {
-		e.preventDefault();
-		body.classList.toggle( 'jetpack-sso-form-display' );
-		if ( ! body.classList.contains( 'jetpack-sso-form-display' ) ) {
-			userLogin.focus();
-			userPassword.disabled = false;
-		}
-	} );
-} );
diff --git a/projects/plugins/jetpack/modules/sso/jetpack-sso-users.js b/projects/plugins/jetpack/modules/sso/jetpack-sso-users.js
deleted file mode 100644
index bf050b5237ba4..0000000000000
--- a/projects/plugins/jetpack/modules/sso/jetpack-sso-users.js
+++ /dev/null
@@ -1,12 +0,0 @@
-document.addEventListener( 'DOMContentLoaded', function () {
-	document
-		.querySelectorAll( '.jetpack-sso-invitation-tooltip-icon, #user_jetpack' )
-		.forEach( function ( tooltip ) {
-			tooltip.addEventListener( 'mouseenter', function () {
-				this.querySelector( '.jetpack-sso-invitation-tooltip' ).style.display = 'block';
-			} );
-			tooltip.addEventListener( 'mouseleave', function () {
-				this.querySelector( '.jetpack-sso-invitation-tooltip' ).style.display = 'none';
-			} );
-		} );
-} );
diff --git a/projects/plugins/jetpack/tools/webpack.config.css.js b/projects/plugins/jetpack/tools/webpack.config.css.js
index 7d29e86a7672d..e95602e091032 100644
--- a/projects/plugins/jetpack/tools/webpack.config.css.js
+++ b/projects/plugins/jetpack/tools/webpack.config.css.js
@@ -171,8 +171,6 @@ for ( const name of [
 	'modules/videopress/css/videopress-editor-style',
 	'modules/widget-visibility/widget-conditions/widget-conditions',
 	'modules/widgets/gallery/css/admin',
-	'modules/sso/jetpack-sso-login',
-	'modules/sso/jetpack-sso-admin-create-user',
 	'modules/masterbar/admin-menu/admin-menu',
 	'modules/masterbar/admin-menu/admin-menu-nav-unification',
 ] ) {