DX: re-apply PHP CS Fixer, partially

Author: keradus

DependencyInjection/DebugExtension.php

@@ -20,7 +20,6 @@
 use Symfony\Component\DependencyInjection\Loader\PhpFileLoader;
 use Symfony\Component\DependencyInjection\Reference;
 use Symfony\Component\VarDumper\Caster\ReflectionCaster;
-use Symfony\Component\VarDumper\Dumper\HtmlDumper;
 
 /**
  * DebugExtension.