diff --git a/src/lib/MVC/Symfony/Security/Authentication/AuthenticatorInterface.php b/src/lib/MVC/Symfony/Security/Authentication/AuthenticatorInterface.php
deleted file mode 100644
index 37f4a1c20e..0000000000
--- a/src/lib/MVC/Symfony/Security/Authentication/AuthenticatorInterface.php
+++ /dev/null
@@ -1,45 +0,0 @@
-<?php
-
-/**
- * @copyright Copyright (C) Ibexa AS. All rights reserved.
- * @license For full copyright and license information view LICENSE file distributed with this source code.
- */
-
-namespace Ibexa\Core\MVC\Symfony\Security\Authentication;
-
-use Symfony\Component\HttpFoundation\Request;
-
-/**
- * This interface is to be implemented by authenticator classes.
- * Authenticators are meant to be used to run authentication programmatically, i.e. outside the firewall context.
- *
- * @deprecated 4.6.7 this class is deprecated. Symfony Security has received major changes in 5.3, therefore Ibexa DXP relies on authenticator system from now on. Will be removed in 5.0.
- */
-interface AuthenticatorInterface
-{
-    /**
-     * Runs authentication against provided request and returns the authenticated security token.
-     *
-     * This method typically does:
-     *  - The authentication by itself (i.e. matching a user)
-     *  - User type checks (e.g. check user activation)
-     *  - Inject authenticated token in the SecurityContext
-     *  - (optional) Trigger SecurityEvents::INTERACTIVE_LOGIN event
-     *
-     * @param \Symfony\Component\HttpFoundation\Request $request
-     *
-     * @return \Symfony\Component\Security\Core\Authentication\Token\TokenInterface
-     *
-     * @throws \Symfony\Component\Security\Core\Exception\AuthenticationException If any authentication issue occured.
-     */
-    public function authenticate(Request $request);
-
-    /**
-     * Performs logout by running configured logout handlers.
-     *
-     * @param \Symfony\Component\HttpFoundation\Request $request
-     *
-     * @return \Symfony\Component\HttpFoundation\Response
-     */
-    public function logout(Request $request);
-}