remove dead code, fixes #1241

Closes #1241

Merge request studip/studip!756

lib/classes/ContentBoxHelper.php

@@ -70,18 +70,4 @@ class ContentBoxHelper {
         $params['contentbox_open'] = $id;
         return URLHelper::getURL("#$id", $params);
     }
-    
-    /**
-     * Sets an object as visited
-     * 
-     * @param String $type the type to be set in the database
-     * @param Array $ids Array of ids that might be visited with the given type
-     */
-    public static function visitType($type, $ids) {
-        $object_id = Request::get('contentbox_open');
-        if ($object_id && in_array($object_id, $ids)) {
-            ObjectVisit::visit($object_id, $type);
-        }
-    }
-
 }