QM_Util::get_admins PHP Method

        public static function get_admins()
        {
            if (is_multisite()) {
                return false;
            } else {
                return get_role('administrator');
            }
        }

 public function deactivate()
 {
     if ($admins = QM_Util::get_admins()) {
         $admins->remove_cap('view_query_monitor');
     }
     # Only delete db.php if it belongs to Query Monitor
     if (class_exists('QM_DB')) {
         unlink(WP_CONTENT_DIR . '/db.php');
     }
 }