Remove the 4xx unregistration. Refs #204.
Remove the 4xx unregistration. Refs #204.

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