bit of cleanup

src/components/nrp-core-dashboard/nrp-core-dashboard.js

 import React from 'react';
 
 import MqttClientService from '../../services/mqtt-client-service';
-//import subscribeToTopic from MqttClientService;
 
 export default class NrpCoreDashboard extends React.Component {
   constructor(props) {

src/services/mqtt-client-service.js

 import mqtt from 'mqtt';
 import { EventEmitter } from 'events';
 
-//import * as proto from 'nrp-jsproto/nrp-engine_msgs-protobuf.js';
-//import { DataPackMessage } from 'nrp-jsproto/nrp-engine_msgs-protobuf.js';
+//import { DataPackMessage } from 'nrp-jsproto/engine_grpc_pb';
 import jspb from '../../node_modules/google-protobuf/google-protobuf';
 
 let _instance = null;