How do I uninstall a Service Worker?

You can also go to the URL: chrome://serviceworker-internals/ and unregister a serviceworker from there.

Removing Service Workers Programmatically

You can remove service workers programmatically like this:

navigator.serviceWorker.getRegistrations().then(function(registrations) {
 for(let registration of registrations) {
  registration.unregister()
} })

Docs: getRegistrations, unregister

Removing Service Workers Through The User Interface

You can also remove service workers under the Application tab in Chrome Devtools.