Remove old CSS directory

phpcs-errors:238 phpunit-status:successful

index.php

@@ -33,7 +33,6 @@
 require __DIR__ . "/translation-importer/$lang/csvxml-overview.php";
 
 $toInject = '
-    <link rel="stylesheet" type="text/css" href="assets/css/editMenu.css" />
     <script src="assets/js/newToolTip.js" type="text/javascript" defer></script>
 ';
 echo printHTMLHead($toInject);