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