code: func (menu *Menu) DeleteConditional(menuID int64) error {
  	accessToken, err := menu.GetAccessToken()
  	if err != nil {
  		return err
  	}
  
  	uri := fmt.Sprintf("%s?access_token=%s", menuDeleteConditionalURL, accessToken)
  	reqDeleteConditional := &reqDeleteConditional{
  		MenuID: menuID,
  	}
  
  	response, err := util.PostJSON(uri, reqDeleteConditional)
  	if err != nil {
  		return err
  	}
  
  	return util.DecodeWithCommonError(response, "DeleteConditional")
  }
docs: //DeleteConditional 删除个性化菜单