Reason

In T364779#10562921, @Mvolz wrote:

mediawiki/services/example-node-api
isn't actually " in production " - it's just a template. I think maybe we can just mark the whole thing as deprecated and stop updating it? In practice no one has been using the template in years.

To-do list (simplified as most doesn't apply)

• This task
  • Add maintainers of that service 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).
• On-wiki documentation
  • Not applicable.
• Phabricator
  • Not applicable.
• Translatewiki.net/translations
  • Not applicable.
• Configuration/tests/integrations/etc.
  • Remove tests in integration/config (zuul/layout.yaml).
• 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, remove all access lists and reparent on All-Archived-Project): https://gerrit.wikimedia.org/r/admin/repos/mediawiki/services/example-node-api,general
  • Deactivate the Diffusion repository for the service: https://phabricator.wikimedia.org/diffusion/MSEN/
  • Delete the GitHub mirror: https://github.com/wikimedia/mediawiki-services-example-node-api