ci: delete broken codex-review.yml workflow

.github/workflows/codex-review.yml

@@ -1,22 +0,0 @@
-# name: Codex PR Review
-
-# on:
-#   pull_request:
-#     types: [opened, synchronize]
-
-# jobs:
-#   request-codex-review:
-#     runs-on: ubuntu-latest
-#     permissions:
-#       pull-requests: write
-#     steps:
-#       - name: Request Codex Review
-#         uses: actions/github-script@v8
-#         with:
-#           script: |
-#             await github.rest.issues.createComment({
-#               owner: context.repo.owner,
-#               repo: context.repo.repo,
-#               issue_number: context.payload.pull_request.number,
-#               body: '@codex review'
-#             });