chore: delete "unapproved issue" workflow (#12008)

.github/workflows/comment-unapproved-issues

@@ -1,18 +0,0 @@
-name: Add comment
-on:
-  issues:
-    types:
-      - labeled
-jobs:
-  add-comment:
-    if: github.event.label.name == '🚨 needs approval'
-    runs-on: ubuntu-latest
-    permissions:
-      issues: write
-    steps:
-      - name: Add comment
-        uses: peter-evans/create-or-update-comment@5f728c3dae25f329afbe34ee4d08eef25569d79f
-        with:
-          issue-number: ${{ github.event.issue.number }}
-          body: |
-            This feature request has not been reviewed yet by the Product Team and needs approval beforehand. Once approved, this issue is available for anyone to work on. **Make sure to reference this issue in your pull request.** :sparkles: Thank you for your contribution! :sparkles: