Unregister all SW registrations

unregister.js

try {
   navigator.serviceWorker.getRegistrations().then(function(registrations) {
       registrations.forEach(function(registration) {
           console.log('removing registration', registration);
           registration.unregister();
       })
   })
}
catch (e) {
   console.log('failed to unregister all service workers', e);
}