function onDeleteFail(model, params, reason) {
	  Flux.dispatch(actionTypes.API_DELETE_FAIL, {
	    model: model,
	    params: params,
	    reason: reason });
	  return Promise.reject(reason);
	}
Handler for API delete fail
@param {Model} model
@param {*} params used to call the `model.delete(params)`
@param {Object} result
@return {Object}