correct cleanup script cleanup

[rtertiaer]

What does this change intend to accomplish?

This PR corrects the cleanup script's clean up of configs on Amplipis.

As of yet, this is untested; I'm filing this now and will only merge this after testing.

Checklist

• Have you tested your changes and ensured they work?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• If applicable, have you updated the documentation/manual?
• If applicable, have you updated the CHANGELOG?
• Does your submission pass linting & tests? You can test on localhost using ./scripts/test
• Have you written new tests for your core features/changes, as applicable?
• If this is a UI change, have you tested it across multiple browser platforms on both desktop and mobile?

[linknum23]

Looks like we lost track of this and duplicated it in #1003. Closing this since that is more tested.