Remove unneeded Config namespace usages

src/Worker/Notifier.php

@@ -4,7 +4,6 @@
  */
 namespace Friendica\Worker;
 
-use Friendica\Core\Config;
 use Friendica\Core\Hook;
 use Friendica\Core\Logger;
 use Friendica\Core\Protocol;
@@ -24,7 +23,6 @@ use Friendica\Protocol\ActivityPub;
 use Friendica\Protocol\Diaspora;
 use Friendica\Protocol\OStatus;
 use Friendica\Protocol\Salmon;
-use Friendica\Util\ACLFormatter;
 
 require_once 'include/items.php';