Remove steps that checks activation failure.
Remove steps that checks activation failure.

justinleoye/ServiceWorker,martinthomson/ServiceWorker,chadoliver/ServiceWorker,zuzusik/ServiceWorker,slightlyoff/ServiceWorker,martinthomson/ServiceWorker,justinleoye/ServiceWorker,zuzusik/ServiceWorker,zuzusik/ServiceWorker,mkruisselbrink/ServiceWorker,justinleoye/ServiceWorker,mkruisselbrink/ServiceWorker,martinthomson/ServiceWorker,chadoliver/ServiceWorker,chadoliver/ServiceWorker,slightlyoff/ServiceWorker