**Reason**: It was closed out in {128a9ef0a0e94ea2c184bb435403dcbe0d20e634}, it would be nice if that could be finished with the new process that we have.
- [x] Archive documentation on `mediawiki.org` ( [https://www.mediawiki.org/w/index.php?title=Extension%3AOggHandler&type=revision&diff=2456128&oldid=2041525] )
- [x] Remove from `mediawiki/extensions` / `mediawiki/skins` ( along with in `.gitmodules`)
- [x] Remove tests in `integration/config` ( `zuul/layout.yaml` )
- [x] Remove from `translatewiki` ( `groups/MediaWiki/mediawiki-extensions.txt` / `groups/MediaWiki/mediawiki-skins.txt` )
- [x] Remove manifest/other references from `mediawiki/vagrant` if they exist
- [x] Empty repository and add a OBSOLETE file.
- [x] Archive Phabricator project #MediaWiki-extensions-OggHandler for associated extension/skin
- [x] Edit Phabricator project #MediaWiki-extensions-OggHandler description for associated extension/skin with a link to this ticket
- [x] Archive the extension's diffusion repository: rEOGG
- [x] Mark the repository read-only in Gerrit: https://gerrit.wikimedia.org/r/#/admin/projects/mediawiki/extensions/OggHandler
- [ ] Delete the GitHub mirror: https://github.com/wikimedia/mediawiki-extensions-OggHandler