**Reason** 
[your rationale]

**To-Do list**
 - [ ] Archive documentation on `mediawiki.org` (provide the 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 the Diffusion repository callsign or URL).
 - [ ] Mark the repository read-only in Gerrit: (provide Gerrit Repository URL).
 - [ ] Delete the GitHub mirror: (provide GitHub repository URL).