Removing the main to master sync GitHub workflow.

.github/workflows/README.md

@@ -0,0 +1 @@
+Github action workflows should be stored in this directrory.

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

@@ -1,25 +0,0 @@
-name: main branch sync
-
-on:
-  push:
-    branches:
-      - 'main'
-
-jobs:
-  branch_sync:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout Code
-        uses: actions/checkout@v2
-        with:
-          # persist-credentials: false allows us to use our own credentials for
-          # pushing to the repository.  Otherwise, the default github actions token
-          # is used.
-          persist-credentials: false
-          fetch-depth: 0
-
-      - name: Update branch
-        env:
-          LLVMBOT_TOKEN: ${{ secrets.LLVMBOT_MAIN_SYNC }}
-        run: |
-          git push https://$LLVMBOT_TOKEN@github.com/${{ github.repository }} HEAD:master