Cleanup fix cs

Author: hannesbochmann

rector.php

@@ -78,8 +78,5 @@
             __DIR__.'/Configuration/*.php',
             __DIR__.'/Configuration/**/*.php',
         ],
-
-        // makes double-quoted strings, we don't want this at the moment.
-        Rector\CodingStyle\Rector\String_\SymplifyQuoteEscapeRector::class,
     ]);
 };