Geo - Remove usage of Geo::FileRegistryRemovalWorker in favor of Geo::DestroyWorker

Summary

The Geo::FileRegistryRemovalWorker is used only by job artifacts and uploads, but both data types have been migrated to the self-service framework in &3114 (closed), and &3115 (closed), which will no longer use this worker.

Proposal

Remove the usage of Geo::FileRegistryRemovalWorker in favor of Geo::DestroyWorker and remove the worker on the next major version %16.0.