fix: Remove Coana workflow files (#580)

Co-authored-by: Garen J. Torikian <gjtorikian@users.noreply.github.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: 3 people

.github/workflows/ci.yml

@@ -42,7 +42,7 @@ jobs:
 
   smoke-test:
     name: Smoke test (Python ${{ matrix.python }})
-    if: github.event_name == 'pull_request' && contains(github.event.pull_request.labels.*.name, 'autorelease: pending')
+    if: "${{ github.event_name == 'pull_request' && contains(toJSON(github.event.pull_request.labels.*.name), 'autorelease: pending') }}"
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false