deleteTeam(cb) {
      log(`Deleting Team ${this.__teamId}`);
      return this._request204or404(`/teams/${this.__teamId}`, undefined, cb, 'DELETE');
   }
Delete Team
@see https://developer.github.com/v3/orgs/teams/#delete-team
@param {Requestable.callback} [cb] - will receive the list of repositories
@return {Promise} - the promise for the http request