Reason
Per T334415#9353983

To-do list

• This task
  • Add maintainers of that extension/skin as subscribers to this task (if they have no apparent Phabricator account, notify them on-wiki or via email if possible and note it here).
  • Add Phabricator project <#ProjectX> as a tag for this task, and remove MediaWiki-extensions-Other/Other-skins as appropriate.
• On-wiki documentation
  • Archive documentation on mediawiki.org (provide URL): https://www.mediawiki.org/wiki/Grants_Review_app (use {{historical}} and link to this task)
  • Update Wikidata item (provide URL) associated with documentation page
    • add statement Abandonware (Q281039) to instance of (P31) together with qualifier start time (P580) = the YYYY-MM-DD date that you decided to archive extension/skin (generally per edit history)
    • add qualifier end time (P582) = the YYYY-MM-DD (same date as above) to instance of (P31) = MediaWiki extension (Q6805426)/MediaWiki skin (Q21996535)
• Phabricator
  • Mark all Phabricator tasks for Wikimedia-IEG-grant-review. Add a comment pointing to this task when doing so for reference.
  • Archive Phabricator project Wikimedia-IEG-grant-review
  • Edit Phabricator project Wikimedia-IEG-grant-review description with a link to this ticket.
• Translatewiki.net/translations
  • Remove from translatewiki.net (groups/MediaWiki/mediawiki-extensions.txt / groups/MediaWiki/mediawiki-skins.txt) - see https://translatewiki.net/wiki/Translating:Wikimedia_Grants_Review
• Configuration/tests/integrations/etc.
  • Remove tests in integration/config (zuul/layout.yaml).
  • Remove manifest/other references from mediawiki/vagrant if they exist.
  • Remove from https://doc.wikimedia.org/cover-extensions/ if present (requires Continuous-Integration-Infrastructure shell user to delete directly from the server).
• Repositories
  • Empty repository, leaving only the README indicating the repo is archived, and referring to this task by URL.
  • Mark the repository read-only in Gerrit (also edit description to prepend "[ARCHIVED]" and a reference to this task): https://gerrit.wikimedia.org/g/wikimedia/iegreview/
  • Deactivate the Diffusion repository: rWIEG
  • Delete the GitHub mirror: https://github.com/wikimedia/wikimedia-iegreview/