refactor: disable ServiceWorker by default

Author: xidedix

src/index.js

@@ -3,7 +3,9 @@ import React from 'react';
 import ReactDOM from 'react-dom';
 import './index.css';
 import App from './App';
-import registerServiceWorker from './registerServiceWorker';
+// disable ServiceWorker
+// import registerServiceWorker from './registerServiceWorker';
 
 ReactDOM.render(<App />, document.getElementById('root'));
-registerServiceWorker();
+// disable ServiceWorker
+// registerServiceWorker();