diff --git a/composer.json b/composer.json
index 8a41e6f..a000629 100644
--- a/composer.json
+++ b/composer.json
@@ -5,11 +5,9 @@
     "license": "GPL-2.0-or-later",
     "minimum-stability": "dev",
     "require": {
-        "drupal/helfi_api_base": "*",
         "drush/drush": "^11 || ^12"
     },
     "require-dev": {
-        "drupal/core-recommended": "^10",
         "dealerdirect/phpcodesniffer-composer-installer": "^0.7.0",
         "drupal/coder": "^8.3",
         "phpspec/prophecy-phpunit": "^2",
@@ -31,31 +29,10 @@
         },
         "files": [ "tests/fixtures/migration_fixture.php" ]
     },
-    "repositories": {
-        "platform": {
-            "type": "composer",
-            "url": "https://repository.drupal.hel.ninja"
-        },
-        "drupal_org": {
-            "type": "composer",
-            "url": "https://packages.drupal.org/8"
-        }
-    },
     "config": {
         "allow-plugins": {
-            "composer/installers": true,
             "dealerdirect/phpcodesniffer-composer-installer": true,
             "phpstan/extension-installer": true
-        },
-        "extra": {
-            "installer-paths": {
-                "sut/core": ["type:drupal-core"],
-                "sut/libraries/{$name}": ["type:drupal-library"],
-                "sut/modules/contrib/{$name}": ["type:drupal-module"],
-                "sut/profiles/contrib/{$name}": ["type:drupal-profile"],
-                "sut/themes/contrib/{$name}": ["type:drupal-theme"],
-                "sut/drush/contrib/{$name}": ["type:drupal-drush"]
-            }
         }
     }
 }
diff --git a/src/Drush/Commands/VersionDrushCommands.php b/src/Drush/Commands/VersionDrushCommands.php
deleted file mode 100644
index ed0e8e3..0000000
--- a/src/Drush/Commands/VersionDrushCommands.php
+++ /dev/null
@@ -1,80 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace DrupalTools\Drush\Commands;
-
-use ComposerLockParser\ComposerInfo;
-use Drupal\Component\DependencyInjection\ContainerInterface;
-use Drupal\helfi_api_base\Package\VersionChecker;
-use Drush\Attributes\Argument;
-use Drush\Attributes\Command;
-use Drush\Commands\DrushCommands;
-
-/**
- * A drush command to check whether given Helfi packages are up-to-date.
- */
-final class VersionDrushCommands extends DrushCommands {
-
-  /**
-   * Constructs a new instance.
-   *
-   * @param \Drupal\helfi_api_base\Package\VersionChecker $versionChecker
-   *   The version checker service.
-   */
-  public function __construct(
-    private readonly VersionChecker $versionChecker,
-  ) {
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public static function create(ContainerInterface $container): self {
-    return new static(
-      $container->get('helfi_api_base.package_version_checker'),
-    );
-  }
-
-  /**
-   * Checks whether Composer packages are up-to-date.
-   *
-   * @param string $file
-   *   The path to composer.lock file.
-   *
-   * @return int
-   *   The exit code.
-   */
-  #[Command(name: 'helfi:tools:check-composer-versions')]
-  #[Argument(name: 'file', description: 'Path to composer.lock file')]
-  public function checkVersions(string $file) : int {
-    $info = new ComposerInfo($file);
-
-    $versions = [];
-    /** @var \Composer\Package\Package $package */
-    foreach (iterator_to_array($info->getPackages()) as $package) {
-      $version = $this->versionChecker->get($package->getName(), $package->getVersion());
-
-      // Skip dev versions since we can't easily verify the latest
-      // version.
-      if (!$version || $version->isLatest || str_starts_with($package->getVersion(), 'dev-')) {
-        continue;
-      }
-      $versions[] = [
-        'name' => $package->getName(),
-        'currentVersion' => $package->getVersion(),
-        'latestVersion' => $version->latestVersion,
-      ];
-    }
-    if (!$versions) {
-      return DrushCommands::EXIT_SUCCESS;
-    }
-
-    $this->io()->table(
-      ['Name', 'Version', 'Latest version'],
-      $versions,
-    );
-    return DrushCommands::EXIT_FAILURE_WITH_CLARITY;
-  }
-
-}