RTMediaAlbum::delete_global PHP Method

    function delete_global($id)
    {
        /**
         * Only admin can delete a global album
         */
        $super_user_ids = get_super_admins();
        if (in_array($this->get_current_author(), array_map('intval', $super_user_ids), true)) {
            $default_album = self::get_default();
            /**
             * Default album is NEVER deleted.
             */
            if (intval($id) === $default_album) {
                return false;
            }
            /**
             * If a global album is deleted then all the media of that album
             * is merged to the default global album and then the album is deleted.
             */
            //merge with the default album
            $this->merge($default_album, $id);
            return $this->delete($id);
        } else {
            return false;
        }
    }