See T137021
It can be undeployed after wmf30.5 (Thur 15th)
- Remove it from the cluster https://gerrit.wikimedia.org/r/359045
- Edit mw:Developers/Maintainers by removing inactive maintainers
- Remove the repository from translatewiki.net. https://gerrit.wikimedia.org/r/359046
- Remove all files in a new commit or make a commit that disables the software contained in it (e.g. disable the entry point if it is an Mediawiki extension), so that a user that pulls it notices that we assume it has no users and it has no maintainer. https://gerrit.wikimedia.org/r/359048
- Set the state in Gerrit to read only.
- Remove it from CI/Zuul. https://gerrit.wikimedia.org/r/359044
Developer notes
T136176 - https://www.mediawiki.org/wiki/Reading/Web/Sunsetting_a_project