revert: sync platform branch with main (#12548)

.github/workflows/sync-platform-branch.yml

@@ -1,23 +0,0 @@
-name: Sync platform branch with the main branch
-
-on:
-  push:
-    branches:
-      - main
-
-jobs:
-  sync:
-    runs-on: ubuntu-latest
-
-    steps:
-    - name: Checkout code
-      uses: actions/checkout@v2
-
-    - name: Fetch platform branch
-      run: git fetch origin platform
-
-    - name: Sync with main
-      run: |
-        git checkout platform
-        git pull origin main --no-rebase
-        git push origin platform