remove: drop renovate.yaml from PR branch (out of scope, blocks CI)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.github/workflows/renovate.yaml

@@ -1,30 +0,0 @@
-name: Renovate
-
-on:
-  schedule:
-    - cron: '0 2 * * 6'  # Saturday 2:00 UTC — aligns with "every weekend" in renovate-config.json
-  workflow_dispatch:
-
-jobs:
-  renovate:
-    runs-on: runners-privilegedescalation
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v6
-
-      - name: Generate GitHub App token
-        id: app-token
-        uses: actions/create-github-app-token@v3
-        with:
-          app-id: ${{ secrets.RELEASE_APP_ID }}
-          private-key: ${{ secrets.RELEASE_APP_PRIVATE_KEY }}
-          owner: privilegedescalation
-
-      - name: Run Renovate
-        uses: renovatebot/github-action@v41.0.0
-        with:
-          token: ${{ steps.app-token.outputs.token }}
-          configurationFile: renovate-config.json
-        env:
-          LOG_LEVEL: debug
-          RENOVATE_AUTODISCOVER: "true"