diff --git a/extension.json b/extension.json
index 29295f9a6..de64401b9 100644
--- a/extension.json
+++ b/extension.json
@@ -24,8 +24,7 @@
 		"GetPreferences": "PopupsHooks",
 		"UserGetDefaultOptions": "PopupsHooks",
 		"MakeGlobalVariablesScript": "PopupsHooks",
-		"LocalUserCreated": "PopupsHooks",
-		"ResourceLoaderRegisterModules": "PopupsHooks"
+		"LocalUserCreated": "PopupsHooks"
 	},
 	"HookHandlers": {
 		"PopupsHooks": {
diff --git a/includes/PopupsHooks.php b/includes/PopupsHooks.php
index 0a019cb5c..f2ccc7721 100644
--- a/includes/PopupsHooks.php
+++ b/includes/PopupsHooks.php
@@ -28,8 +28,6 @@ use MediaWiki\Hook\MakeGlobalVariablesScriptHook;
 use MediaWiki\MediaWikiServices;
 use MediaWiki\Preferences\Hook\GetPreferencesHook;
 use MediaWiki\ResourceLoader\Hook\ResourceLoaderGetConfigVarsHook;
-use MediaWiki\ResourceLoader\Hook\ResourceLoaderRegisterModulesHook;
-use MediaWiki\ResourceLoader\ResourceLoader;
 use MediaWiki\User\Hook\UserGetDefaultOptionsHook;
 use MediaWiki\User\Options\UserOptionsManager;
 use OutputPage;
@@ -45,7 +43,6 @@ class PopupsHooks implements
 	GetPreferencesHook,
 	BeforePageDisplayHook,
 	ResourceLoaderGetConfigVarsHook,
-	ResourceLoaderRegisterModulesHook,
 	MakeGlobalVariablesScriptHook,
 	UserGetDefaultOptionsHook,
 	LocalUserCreatedHook
@@ -283,26 +280,4 @@ class PopupsHooks implements
 			);
 		}
 	}
-
-	/**
-	 * ResourceLoaderRegisterModules hook handler.
-	 *
-	 * Provides support for MLEB where needed.
-	 *
-	 * @see https://www.mediawiki.org/wiki/Manual:Hooks/ResourceLoaderRegisterModules
-	 *
-	 * @param ResourceLoader $resourceLoader
-	 */
-	public function onResourceLoaderRegisterModules( ResourceLoader $resourceLoader ): void {
-		if ( !$resourceLoader->getModule( 'codex-search-styles' ) ) {
-			// We're running an older version of MediaWiki.
-			$resourceLoader->register( [
-				'codex-search-styles' => [
-					'localBasePath' => dirname( __DIR__ ),
-					'remoteExtPath' => 'UniversalLanguageSelector',
-					'styles' => 'resources/codex.mleb.css',
-				]
-			] );
-		}
-	}
 }