code: function (deviceIdentifier, channelIdentifier) {
        var path;
        if (deviceIdentifier && channelIdentifier) {
          path = this.constructPath(constants.DEVICES, deviceIdentifier, constants.CHANNELS, channelIdentifier);
          return this.Core.DELETE(path);
        } else {
          return this.rejectRequest('Bad Request: A device identifier and a channel identifier are required.');
        }
      }
docs: Delete a channel from a device
  @param  {String|Integer} deviceIdentifier  A Robin device identifier
  @param  {String|Integer} channelIdentifier A Robin channel identifier
  @return {Function}                         A Promise