Delete xb_avatar on uninstall

No need for test coverage for this one IMHO.

Tossed up quick, need to manually test

Module is successfully uninstalled and can be properly installed after pulling in the code from this branch.

Found a much simpler, and superior solution:

Also, this would've been caught by test coverage!?

That's trivial to add, something like \Drupal\Tests\acquia_migrate\Functional\ReinstallationExperienceTest would do 😊

Thanks @wim leers – enforced on config makes more sense. I'll update the test

Added test

Approved by @wim leers

Automatically closed - issue fixed for 2 weeks with no activity.