Tidy up Service Worker, only run Workbox in production

Moves ServiceWorker load into Platform so its not done by Electron

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

src/vector/index.ts

@@ -28,11 +28,6 @@ require('highlight.js/styles/github.css');
 import {parseQsFromFragment} from "./url_utils";
 import './modernizr';
 
-// load service worker if available on this platform
-if ('serviceWorker' in navigator) {
-    navigator.serviceWorker.register('service-worker.js');
-}
-
 async function settled(...promises: Array<Promise<any>>) {
     for (const prom of promises) {
         try {