**Reason**:
Looking at [[ https://www.mediawiki.org/wiki/Extension:Live_Translate | Live Translate documentation ]], it seems all its feature are now part of [[ https://www.mediawiki.org/wiki/Extension:Translate | Translate ]] and [[ https://www.mediawiki.org/wiki/Extension:ContentTranslation | ContentTranslation ]].
LiveTranslate does not seem to be maintained anymore, the last code is from September 2011.
- [x] Archive documentation on `mediawiki.org` ( https://www.mediawiki.org/wiki/Extension:Live_Translate )
- [x] Remove from `mediawiki/extensions` ( along with in `.gitmodules`)
- [x] Remove tests in `integration/config` ( `zuul/layout.yaml` )
- [x] Remove from `translatewiki` ( `groups/MediaWiki/mediawiki-extensions.txt` )
- [x] Remove manifest/other references from `mediawiki/vagrant` if they exist
- [ ] Empty repository and add a OBSOLETE file.
- [x] Archive Phabricator project #mediawiki-extensions-livetranslate for associated extension/skin
- [x] Edit Phabricator project #mediawiki-extensions-livetranslate description for associated extension with a link to this ticket
- [ ] Archive the extension's diffusion repository: ( https://phabricator.wikimedia.org/diffusion/ELIT/ )
- [ ] Mark the repository read-only in Gerrit: ( https://gerrit.wikimedia.org/r/#/admin/projects/mediawiki/extensions/LiveTranslate )
- [x] Delete the GitHub mirror: https://github.com/wikimedia/mediawiki-extensions-LiveTranslate