diff --git a/docs/config-schema.yaml b/docs/config-schema.yaml
index 45ffdc84025..2a038e08b91 100644
--- a/docs/config-schema.yaml
+++ b/docs/config-schema.yaml
@@ -3087,11 +3087,6 @@ config-schema:
             Show a bar of language selection links in the user login and user
             registration forms; edit the "loginlanguagelinks" message to
             customise these.
-    ExperimentalLoginPopup:
-        default: false
-        description: |-
-            Add extra login links that open different kinds of modal dialogs instead of navigating the page.
-            As of May 2024, this config option is experimental and may be removed or changed in the future.
     ForceUIMsgAsContentMsg:
         default: {  }
         type: object
diff --git a/docs/config-vars.php b/docs/config-vars.php
index 626a41b0dd6..51192e00bb5 100644
--- a/docs/config-vars.php
+++ b/docs/config-vars.php
@@ -1892,12 +1892,6 @@ $wgUseXssLanguage = null;
  */
 $wgLoginLanguageSelector = null;
 
-/**
- * Config variable stub for the ExperimentalLoginPopup setting, for use by phpdoc and IDEs.
- * @see MediaWiki\MainConfigSchema::ExperimentalLoginPopup
- */
-$wgExperimentalLoginPopup = null;
-
 /**
  * Config variable stub for the ForceUIMsgAsContentMsg setting, for use by phpdoc and IDEs.
  * @see MediaWiki\MainConfigSchema::ForceUIMsgAsContentMsg
diff --git a/includes/MainConfigNames.php b/includes/MainConfigNames.php
index 9269a3bc235..3d7478976fb 100644
--- a/includes/MainConfigNames.php
+++ b/includes/MainConfigNames.php
@@ -1907,12 +1907,6 @@ class MainConfigNames {
 	 */
 	public const LoginLanguageSelector = 'LoginLanguageSelector';
 
-	/**
-	 * Name constant for the ExperimentalLoginPopup setting, for use with Config::get()
-	 * @see MainConfigSchema::ExperimentalLoginPopup
-	 */
-	public const ExperimentalLoginPopup = 'ExperimentalLoginPopup';
-
 	/**
 	 * Name constant for the ForceUIMsgAsContentMsg setting, for use with Config::get()
 	 * @see MainConfigSchema::ForceUIMsgAsContentMsg
diff --git a/includes/MainConfigSchema.php b/includes/MainConfigSchema.php
index 3d67e593b1c..7d47ea61fb5 100644
--- a/includes/MainConfigSchema.php
+++ b/includes/MainConfigSchema.php
@@ -4973,15 +4973,6 @@ class MainConfigSchema {
 		'default' => false,
 	];
 
-	/**
-	 * Add extra login links that open different kinds of modal dialogs instead of navigating the page.
-	 *
-	 * As of May 2024, this config option is experimental and may be removed or changed in the future.
-	 */
-	public const ExperimentalLoginPopup = [
-		'default' => false,
-	];
-
 	/**
 	 * When translating messages with wfMessage(), it is not always clear what
 	 * should be considered UI messages and what should be content messages.
diff --git a/includes/config-schema.php b/includes/config-schema.php
index 1689326639c..761fcec99e2 100644
--- a/includes/config-schema.php
+++ b/includes/config-schema.php
@@ -605,7 +605,6 @@ return [
 			'VariantArticlePath' => false,
 			'UseXssLanguage' => false,
 			'LoginLanguageSelector' => false,
-			'ExperimentalLoginPopup' => false,
 			'ForceUIMsgAsContentMsg' => [
 			],
 			'RawHtmlMessages' => [
diff --git a/includes/skins/SkinTemplate.php b/includes/skins/SkinTemplate.php
index d372b79fda7..a728fa2f65e 100644
--- a/includes/skins/SkinTemplate.php
+++ b/includes/skins/SkinTemplate.php
@@ -517,16 +517,6 @@ class SkinTemplate extends Skin {
 					? 'login'
 					: 'login-private';
 				$personal_urls[$key] = $login_url;
-
-				if ( $this->getConfig()->get( MainConfigNames::ExperimentalLoginPopup ) ) {
-					// Allow testing the new login flows (T364941).
-					// The label is not localized because this is temporary and not to be enabled in production.
-					foreach ( [ 'popup', 'iframe', 'newtab' ] as $mode ) {
-						$personal_urls["login-experimental-$mode"] = $login_url;
-						unset( $personal_urls["login-experimental-$mode"]['single-id'] );
-						$personal_urls["login-experimental-$mode"]['text'] .= " (TEST: $mode)";
-					}
-				}
 			}
 		}
 
diff --git a/resources/Resources.php b/resources/Resources.php
index d2b6d4564b4..5fc97b018bf 100644
--- a/resources/Resources.php
+++ b/resources/Resources.php
@@ -1674,7 +1674,6 @@ return [
 			'ready.js',
 			'checkboxShift.js',
 			'checkboxHack.js',
-			'experimentalLoginPopup.js',
 			'teleportTarget.js',
 			'toggleAllCollapsibles.js',
 			[ 'name' => 'config.json', 'callback' => static function (
@@ -1685,7 +1684,6 @@ return [
 					'search' => true,
 					'collapsible' => true,
 					'sortable' => true,
-					'experimentalLoginPopup' => $config->get( MainConfigNames::ExperimentalLoginPopup ),
 					'selectorLogoutLink' => '#pt-logout a[data-mw="interface"]'
 				];
 
diff --git a/resources/src/mediawiki.page.ready/experimentalLoginPopup.js b/resources/src/mediawiki.page.ready/experimentalLoginPopup.js
deleted file mode 100644
index cc2c3d13b27..00000000000
--- a/resources/src/mediawiki.page.ready/experimentalLoginPopup.js
+++ /dev/null
@@ -1,33 +0,0 @@
-module.exports = function experimentalLoginPopup() {
-	const modes = {
-		popup: 'startPopupWindow',
-		newtab: 'startNewTabOrWindow',
-		iframe: 'startIframe'
-	};
-
-	for ( const mode in modes ) {
-		const method = modes[ mode ];
-
-		$( `#pt-login-experimental-${ mode }` ).on( 'mouseenter', () => {
-			// Load early
-			mw.loader.using( 'mediawiki.authenticationPopup' );
-		} );
-
-		$( `#pt-login-experimental-${ mode } a` ).on( 'click', ( e ) => {
-			e.preventDefault();
-			mw.loader.using( 'mediawiki.authenticationPopup' ).then( ( require ) => {
-				const authPopup = require( 'mediawiki.authenticationPopup' );
-				authPopup[ method ]().then( ( userinfo ) => {
-					if ( userinfo ) {
-						mw.notify( 'LOGGED IN', { type: 'success' } );
-					} else {
-						mw.notify( 'CANCELLED' );
-					}
-				} ).catch( ( error ) => {
-					mw.notify( String( error ), { type: 'error' } );
-				} );
-			} );
-		} );
-
-	}
-};
diff --git a/resources/src/mediawiki.page.ready/ready.js b/resources/src/mediawiki.page.ready/ready.js
index c6e55ce1829..9a778917a5f 100644
--- a/resources/src/mediawiki.page.ready/ready.js
+++ b/resources/src/mediawiki.page.ready/ready.js
@@ -1,6 +1,5 @@
 var checkboxShift = require( './checkboxShift.js' );
 var config = require( './config.json' );
-var experimentalLoginPopup = require( './experimentalLoginPopup.js' );
 var teleportTarget = require( './teleportTarget.js' );
 
 // Break out of framesets
@@ -176,10 +175,6 @@ $( () => {
 		updatePermanentLinkHash();
 	}
 
-	if ( config.experimentalLoginPopup ) {
-		experimentalLoginPopup();
-	}
-
 	/**
 	 * Fired when a trusted UI element to perform a logout has been activated.
 	 *