code: function (data, config, cb) {
              if (data.tags === undefined) {
                  return new Error("tags param can not be empty.");
              }
              api.delete(this.baseURL + 'tags', data, config, cb);
          }
docs: Remove tags request is used to remove tags from alerts in OpsGenie
  One of id or alias parameters should be specified with add tags request. Alias option can only be used for open alerts
  Also, tags param is mandatory as "tags": "emergency, delay"
  
  @deprecated