Removed unused imports

Author: GrahamCampbell

Tests/ClientTest.php

@@ -12,7 +12,6 @@
 namespace Symfony\Component\HttpKernel\Tests;
 
 use Symfony\Component\HttpKernel\Client;
-use Symfony\Component\HttpKernel\HttpKernel;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpFoundation\StreamedResponse;