Decommission the orphaned spellcheck-gm worker

3563 inlined the synchronous spellcheck helper and deleted

bin/worker/spellcheck-gm, but left the worker-spellcheck-gm ECS service, its config/workers.json entry, and its generated task def behind. The service can only run pre-#3563 images and crash-loops (exec: no such file) on any newer worker22 build, so it's the one worker that never converges on a fleet deploy.

Remove it from workers.json (the single source of truth), regenerate worker22-deploy.yml, and drop the stale task def. dw-terraform derives its worker set from this file over HTTP, so terraform apply will destroy the service and its log group on the next run.

Co-Authored-By: Claude Opus 4.8 (1M context) noreply@anthropic.com

Commit: 04a64078 Author: Mark Smith