The Special:RemoveGlobalBlock page needs to be updated to support global autoblocks. This includes removing autoblocks when the parent global block is removed and allowing the form to remove global autoblocks.
Furthermore, the success message shown when unblocking using a global block ID needs to be improved, as it currently refers to the global block ID as a user. Example:
Acceptance criteria
- Allow Special:RemoveGlobalBlock to remove global autoblocks when the parent global block is removed using the form
- Allow the special page to remove global autoblocks
- Improve the success message used when removing global blocks using their global block ID

