Remove Chrome app loader

Chrome apps have been deprecated for a while now, since PWAs are a
better replacement. This app should get with the times too

js/start.js

@@ -1,8 +0,0 @@
-chrome.app.runtime.onLaunched.addListener(function() {
-  chrome.app.window.create('index.html', {
-    'outerBounds': {
-      'width': 400,
-      'height': 500
-    }
-  });
-});