Remove the renovate action in favor of the GH app

.github/workflows/renovate.yaml

@@ -1,25 +0,0 @@
-name: Renovate
-on:
-  schedule:
-    # Run every day at 1 AM UTC (before the nightly build at 2 AM UTC)
-    - cron: '0 1 * * *'
-  # Allow manual triggering
-  workflow_dispatch:
-
-permissions:
-  contents: write
-  pull-requests: write
-  issues: write
-
-jobs:
-  renovate:
-    name: Run Renovate
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      
-      - name: Self-hosted Renovate
-        uses: renovatebot/github-action@v41.0.3
-        with:
-          configurationFile: renovate.json
-          token: ${{ secrets.GITHUB_TOKEN }}