My own Service Worker cache is found at the folder:
C:\Users\USER-NAME\AppData\Local\Microsoft\Edge\User Data\Default\Service Worker\CacheStorage\3cedfb74d44f2e84198d23075aef16c34a668ceb.
J'ai tried to clean it up using in edge://settings/clearBrowserData
the option of "Cached images and files", but this didn't touch the
Service Worker cache.
So Je viens de went into the above folder with explorer and deleted all
its contents, but left the folder itself in place.
Then I started Microsoft Edge, and it started without any problem.
It also re-populated the folder with new content.
So my answer is: Yes, vous pouvez delete it from Explorer.
Si vous êtes worried about safety, you may at first step move the contents
to a temporary folder and run Microsoft Edge. If everything works well,
you may then delete the temporary folder.
Remarque : Google Chrome behaves in exactly the same way. Its cache is found at:
C:\Users\USER-NAME\AppData\Local\Google\Chrome\User Data\Default\Service Worker.