Remove sync action in favor of CI job

.github/workflows/opencode-sync.yml

@@ -1,37 +0,0 @@
-name: opencode-sync
-on:
-  workflow_dispatch:
-    inputs:
-      debug_enabled:
-        type: boolean
-        description: 'Run the build with tmate debugging enabled (https://github.com/marketplace/actions/debugging-with-tmate)'
-        required: false
-        default: false
-  schedule:
-    - cron: '5 */1 * * *' # Every hour
-
-permissions:
-  contents: read # to fetch code (actions/checkout)
-jobs:
-  to_gitlab:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-        with:
-          fetch-depth: 0
-      - uses: webfactory/ssh-agent@v0.6.0
-        with:
-          ssh-private-key: ${{ secrets.OPENCODE_SYNC_SSH_PRIVATE_KEY }}
-      - name: Mirror
-        run: |
-          export GIT_SSH_COMMAND="ssh -v -o StrictHostKeyChecking=no -o KexAlgorithms=curve25519-sha256 -o ServerAliveInterval=20"
-
-          echo "Adding opencode remote"
-          git remote add opencode git@gitlab.opencode.de:bmi/souveraener_arbeitsplatz/component-code/management/openproject/openproject-core.git
-
-          echo "Pushing all refs"
-          git push --tags --force --prune opencode "refs/remotes/origin/*:refs/heads/*"
-      - uses: mxschmitt/action-tmate@v3
-        if: ${{ github.event_name == 'workflow_dispatch' && inputs.debug_enabled && failure() }}
-        with:
-          limit-access-to-actor: true