/// <summary>
 /// 删除特定 config,如果 config 已被 应用到机器组,则 Logtail 配置也会被删除。
 /// </summary>
 /// <param name="client">client实例。</param>
 /// <param name="configName">日志配置名称。</param>
 /// <param name="project">项目名,此参数将覆盖 client 中默认设置。</param>
 /// <returns>异步响应结果。</returns>
 /// <seealso cref="ILogServiceClient.DeleteConfigAsync"/>
 public static Task <IResponse> DeleteConfigAsync(this ILogServiceClient client,
                                                  String configName,
                                                  String project = null)
 => client.DeleteConfigAsync(new DeleteConfigRequest(configName)
 {
     ProjectName = project
 });