ci: remove sync-to-gitea workflow (not needed)

.github/workflows/sync-to-gitea.yml

@@ -1,29 +0,0 @@
-name: sync-to-gitea
-
-on:
-  push:
-    branches:
-      - main
-
-jobs:
-  sync:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-
-      - name: Push to Gitea
-        env:
-          GITEA_USERNAME: ${{ secrets.GITEA_USERNAME }}
-          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
-        run: |
-          echo "Syncing to Gitea: https://ci.nxtgauge.com/Admin/${{ github.event.repository.name }}"
-          echo "GitHub commit: $(git rev-parse HEAD)"
-          echo "Target branch: high-performance"
-
-          git remote add gitea "https://${GITEA_USERNAME}:${GITEA_TOKEN}@ci.nxtgauge.com/Admin/${{ github.event.repository.name }}.git"
-          git push gitea main:high-performance --force-with-lease
-
-          echo "Sync complete!"