Fix CS

Author: fabpot

Tests/FirewallTest.php

@@ -12,7 +12,6 @@
 namespace Symfony\Component\Security\Http\Tests;
 
 use PHPUnit\Framework\TestCase;
-use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\Event\GetResponseEvent;
 use Symfony\Component\HttpKernel\HttpKernelInterface;
 use Symfony\Component\Security\Http\Firewall;