Make sure plugin loading works in NPX builds

Summary: Make sure non-bundled plugins load correctly . Note that sourcemaps don't load yet

Reviewed By: nikoant

Differential Revision: D33278639

fbshipit-source-id: 9951286ec6df65f33149e4687261a43e6c072c31

desktop/static/index.web.html

@@ -57,26 +57,12 @@
 
     </div>
 
-    <script src="/socket.io/socket.io.js"></script>
-
     <script>
       (function() {
         // FIXME: needed to make Metro work
         window.global = window;
         let suppressErrors = false;
 
-        const socket = io(location.origin);
-
-        socket.on('refresh', () => {
-          location.reload();
-        });
-
-        socket.on('hasErrors', (html) => {
-          openError(html);
-          suppressErrors = true;
-        });
-
-
         function openError(text) {
           if (suppressErrors) {
             return;