refactored phpdoc, return/break statements, uses

application/core/Maps/MapQueue.php

@@ -4,7 +4,6 @@ namespace ManiaControl\Maps;
 
 use ManiaControl\Admin\AuthenticationManager;
 use ManiaControl\Callbacks\CallbackListener;
-use ManiaControl\Callbacks\CallbackManager;
 use ManiaControl\Commands\CommandListener;
 use ManiaControl\Formatter;
 use ManiaControl\ManiaControl;