Remove FOSUserBundle use statement (#4862)

Author: dannyvw

src/Symfony/Bundle/DependencyInjection/Configuration.php

@@ -23,7 +23,6 @@
 use Doctrine\ORM\EntityManagerInterface;
 use Doctrine\ORM\OptimisticLockException;
 use Elasticsearch\Client as ElasticsearchClient;
-use FOS\UserBundle\FOSUserBundle;
 use GraphQL\GraphQL;
 use Symfony\Bundle\FullStack;
 use Symfony\Bundle\MakerBundle\MakerBundle;