**Reason**:
- Provide your rationale here.
- [ ] Archive documentation on `mediawiki.org` (provide URL to the extension/skin here).
- [ ] Remove from `mediawiki/extensions` / `mediawiki/skins` (along with in `.gitmodules`).
- [ ] Remove tests in `integration/config` (`zuul/layout.yaml`).
- [ ] Remove from `translatewiki` (`groups/MediaWiki/mediawiki-extensions.txt` / `groups/MediaWiki/mediawiki-skins.txt`).
- [ ] Remove manifest/other references from `mediawiki/vagrant` if they exist.
- [ ] Empty repository and add an ARCHIVED file.
- [ ] Archive Phabricator project `<#ProjectX>` for associated extension/skin.
- [ ] Edit Phabricator project `<#ProjectX>` description for associated extension/skin with a link to this ticket.
- [ ] Archive the extension's diffusion repository: (Provide Diffusion Repository callsign or URL here).
- [ ] Mark the repository read-only in Gerrit: (Provide Gerrit Repository URL here).
- [ ] Delete the GitHub mirror: (provide GitHub repository URL here).