Remove unused post-comment step IDs

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

.github/workflows/pr-checks.yml

@@ -288,7 +288,6 @@ jobs:
           fi
 
       - name: Post a warning about modifying CHANGELOG.md
-        id: post-changelog-warning
         # Release, backport, mergeback, and bundle-update PRs deliberately modify CHANGELOG.md,
         # so skip comment management entirely for these automation flows.
         if: >-
@@ -308,7 +307,6 @@ jobs:
           token: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Mark the CHANGELOG.md concern as resolved
-        id: resolve-changelog-warning
         if: >-
           needs.other-checks.outputs.changelog-modified != 'true' &&
           !startsWith(github.event.pull_request.head.ref, 'update-v') &&