https://git.drupalcode.org/project/geocoder/-/blob/8.x-3.x/src/Geocoder....
Was committed most likely accidentally as part of #3202941: Plugin comes as a string instead of GeocoderProviderInterface →
Remove it and update tests to provide coverage, it's a bit strange that this didn't fail tests at all?
Fixed
3.0
Code
Not all content is available!
It's likely this issue predates Contrib.social: some issue and comment data are missing.