refactor(service-worker): remove commented code for clarity

public/service-worker.js

@@ -115,7 +115,6 @@ self.addEventListener('fetch', event => {
   }
 });
 
-// Handle messages from clients
 self.addEventListener('message', event => {
   if (event.data && event.data.type === 'SKIP_WAITING') {
     self.skipWaiting();