/**
  * delete_options
  *
  * @param string
  * @return 
  * @version 1.0.2
  */
 public static function delete_options($key)
 {
     self::$opts = self::get_options();
     if (!isset(self::$opts[$key])) {
         return false;
     }
     unset(self::$opts[$key]);
     set_theme_mod(__CLASS__, self::$opts);
     return self::$opts;
 }