Fix CS

Author: fabpot

Tests/Controller/ErrorControllerTest.php

@@ -13,7 +13,6 @@
 
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\ErrorHandler\ErrorRenderer\HtmlErrorRenderer;
-use Symfony\Component\ErrorHandler\Exception\FlattenException;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\Controller\ErrorController;