**Reason**
It's (soon to be) no longer used.
**To-do list**
- This task
-- [x] 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).
-- [x] Add Phabricator project <#parsoid> as a tag for this task, and remove #mediawiki-extensions-other/#other-skins as appropriate.
- On-wiki documentation
-- [x] Clean up references on MediaWiki.org
-- [x] Clean up references on wikitech
- Phabricator
-- [x] Mark all Phabricator tasks for the deploy repo as Invalid. Add a comment pointing to this task when doing so for reference.
- Configuration/tests/integrations/etc.
-- [x] Remove tests in [[ https://gerrit.wikimedia.org/g/integration/config | integration/config ]] ([[ https://gerrit.wikimedia.org/r/plugins/gitiles/integration/config/+/master/zuul/layout.yaml | zuul/layout.yaml ]]).
-- [x] Remove manifest/other references from [[ https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/vagrant/+/master | mediawiki/vagrant ]].
- Repositories
-- [x] Empty repository, leaving only a 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 Txxxxxx]" and a reference to this task): https://gerrit.wikimedia.org/g/mediawiki/services/parsoid/deploy
-- [x] Archive the Diffusion repository: https://phabricator.wikimedia.org/diffusion/GPAD/
-- [x] Delete the GitHub mirror: https://github.com/wikimedia/mediawiki-services-parsoid-deploy