Remove redundant code

Signed-off-by: Matt Friedman <[email protected]>

event/listener.php

@@ -30,7 +30,7 @@ public static function getSubscribedEvents()
 		return [
 			'core.ucp_display_module_before'	=> 'load_language',
 			'core.acp_main_notice'				=> 'compatibility_notice',
-			'core.page_header_after'			=> [['load_template_data'], ['service_worker_url']],
+			'core.page_header_after'			=> 'load_template_data',
 		];
 	}
 
@@ -99,15 +99,4 @@ public function compatibility_notice()
 	{
 		$this->template->assign_var('S_WPN_COMPATIBILITY_NOTICE', phpbb_version_compare(PHPBB_VERSION, '4.0.0-dev', '>='));
 	}
-
-	/**
-	 * Generate service worker URL globally for update
-	 */
-	public function service_worker_url()
-	{
-		if (!$this->template->retrieve_var('U_WEBPUSH_WORKER_URL'))
-		{
-			$this->template->assign_var('U_WEBPUSH_WORKER_URL', $this->controller_helper->route('phpbb_webpushnotifications_ucp_push_worker_controller'));
-		}
-	}
 }