As per https://phabricator.wikimedia.org/T112408#3389081
https://www.mediawiki.org/wiki/Gerrit/Inactive_projects
https://www.mediawiki.org/wiki/Extension:Nonlinear
https://phabricator.wikimedia.org/diffusion/ENOL/history/master/
https://gerrit.wikimedia.org/r/#/q/project:mediawiki/extensions/Nonlinear+status:open
https://phabricator.wikimedia.org/maniphest/query/83bLePkOvY9X/#R
- [x] Archive documentation on `mediawiki.org` (already done)
- [x] Remove from `mediawiki/extensions`
- [x] Remove tests in `intregation/config` ( `zuul/layout.yaml` ) (partially done at 1c5c3fc247b1 by @MarcoAurelio, set to `archived`)
- [] Remove from `translatewiki` ( `groups/MediaWiki/mediawiki-extensions.txt` )
- [x] Mark as read-only on Gerrit (done by @hashar)
- [] Archive Phabricator project