**Rationale**
The Configure extension was a great effort at providing on-wiki control of MediaWiki config. Sadly it required manual updating to keep in sync with core which has long since fallen to the wayside. Considering this has always been a goal to get in core, and given Configure's poor current maintenance, I'm curious if we should shut it down.
**To-do list**
- This task
-- [x] Add maintainers of that extension 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).
-- [x] Add Phabricator project #mediawiki-extensions-configure as a tag for this task.
- On-wiki documentation
-- [x] Archive documentation on `mediawiki.org` (https://www.mediawiki.org/wiki/Extension:Configure): replace page contents with `{{TNT|Archived extension|last revision id before archiving|reason=archive reasons, per [[phab:T185227]]}}`.
-- [x] If documentation page was translatable, remove `<translate>`, visit Special:PageTranslation, and click "remove from translation" (if you don't have the translation administrator right, ask a [[ https://www.mediawiki.org/wiki/Special:ListUsers/translationadmin | user who does ]]).
-- [x] Archive Wikidata item associated with documentation page (https://www.wikidata.org/wiki/Q21676657) (remove nearly all statements, except `instance of (P31) = MediaWiki extension (Q6805426)`, which should add a qualifier `end time (P582) = the YYYY-MM-DD date that you decided to archive extension, generally per edit history`, change English (and other languages if possible) description to "archived MediaWiki extension" (and its translation)).
- Phabricator
-- [x] Archive Phabricator project #mediawiki-extensions-configure for the extension.
-- [x] Mark all Phabricator tasks for the extension either Declined or Invalid.
-- [x] Edit Phabricator project #mediawiki-extensions-configure description for the extension with a link to this ticket.
- Translatewiki.net/translations
-- [x] Remove from `translatewiki.net` (`groups/MediaWiki/mediawiki-extensions.txt`) (add #translatewiki.net project as a tag for this task). https://gerrit.wikimedia.org/r/c/translatewiki/+/497799
- Configuration/tests/integrations/etc.
-- [x] Remove from `mediawiki/extensions` (along with in `.gitmodules`). https://gerrit.wikimedia.org/r/c/mediawiki/extensions/+/497801
-- [x] Remove tests in [[ https://gerrit.wikimedia.org/g/integration/config | `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
-- [x] Empty repository leaving only the README indicating the repo is archived and referring to this task by URL. https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Configure/+/498005
-- [ ] Mark the repository read-only in Gerrit (Edit description to prepend "[ARCHIVED]" and append Task reference): (provide Gerrit Repository URL).
-- [ ] Archive the diffusion repository for the extension: (provide the Diffusion repository callsign or URL).
-- [ ] Delete the GitHub mirror: (provide GitHub repository URL).