Removed fetch event..

static/service-worker.js

@@ -33,13 +33,6 @@ self.addEventListener('activate', function (event) {
     )
 });
 
-self.addEventListener('fetch', function (event) {
-    event.respondWith(
-        fetch(event.request).catch(function() {
-            return caches.match(event.request);
-        })
-    );
-});
 
 function requestBackend(event){
     var url = event.request.clone();