chore: remove dead release workflow code

- Delete unused _release.yml workflow (never called)
- Remove commented-out release job from ci.yml

Author: vredchenko

.github/workflows/_release.yml

@@ -75,10 +75,3 @@ jobs:
     if: needs.check.outputs.branch-pr == ''
     uses: ./.github/workflows/_dist.yml
 
-# TODO restore or remove
-#  release:
-#    if: github.ref_type == 'tag'
-#    needs: [dist]
-#    uses: ./.github/workflows/_release.yml
-#    permissions:
-#      contents: write