Remove a workflow for cloud run

.github/workflows/merge-for-cloudrun.yml

@@ -1,18 +0,0 @@
-name: Sync multiple branches
-on:
-  push:
-    branches:
-      - 'master'
-jobs:
-  sync-branch:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@master
-
-      - name: Merge master -> CloudRunButton
-        uses: devmasx/merge-branch@v1.3.1
-        with:
-          type: now
-          from_branch: master
-          target_branch: CloudRunButton
-          github_token: ${{ secrets.GITHUB_TOKEN }}