chore(ci): remove add-pr-comment step (#2463)

Signed-off-by: ashing <[email protected]>

Author: ronething

.github/actions/add-pr-comment

@@ -127,11 +127,3 @@ jobs:
           echo '```yaml' >> report.md
           cat apisix-ingress-controller-conformance-report.yaml >> report.md
           echo '```' >> report.md
-
-      - name: Report Conformance Test Result to PR Comment
-        if: ${{ github.event_name == 'pull_request' }}
-        uses: ./.github/actions/add-pr-comment
-        with:
-          message-id: 'apisix-conformance-test-report-${{ matrix.provider_type }}'
-          message-path: |
-            report.md

.github/workflows/apisix-conformance-test.yml

@@ -21,6 +21,3 @@
 [submodule ".github/actions/markdown-link-check"]
 	path = .github/actions/markdown-link-check
 	url = https://github.com/gaurav-nelson/github-action-markdown-link-check.git
-[submodule ".github/actions/add-pr-comment"]
-	path = .github/actions/add-pr-comment
-	url = https://github.com/mshick/add-pr-comment.git