remove unused function import

Author: dbu

tests/Functional/Fixtures/Controller/TagAttributeController.php

@@ -13,7 +13,6 @@
 
 use FOS\HttpCacheBundle\Configuration\Tag;
 use FOS\HttpCacheBundle\Http\SymfonyResponseTagger;
-use function mysql_xdevapi\expression;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
 use Symfony\Bundle\FrameworkBundle\Controller\Controller;
 use Symfony\Component\HttpFoundation\Request;