Auth: Remove setting the not existent layout 'login' when logging out externally authenticated users

fixes #7191

application/controllers/AuthenticationController.php

@@ -148,7 +148,6 @@ class AuthenticationController extends ActionController
         $isRemoteUser = $auth->getUser()->isRemoteUser();
         $auth->removeAuthorization();
         if ($isRemoteUser === true) {
-            $this->_helper->layout->setLayout('login');
             $this->_response->setHttpResponseCode(401);
         } else {
             $this->redirectToLogin();