[bitnami/containers] Delete sync-labels.yml (#37363)

This workflow is not needed, it is syncing the labels with the same source and destination.

Signed-off-by: Fran Mulero <fmulero@vmware.com>

.github/workflows/sync-labels.yml

@@ -1,18 +0,0 @@
-name: '[Support] Synchronize labels from the containers repository'
-on:
-  schedule:
-    # Daily
-    - cron: '0 3 * * *'
-# Remove all permissions by default
-permissions: {}
-jobs:
-  sync-labels:
-    runs-on: ubuntu-latest
-    permissions:
-      issues: write
-    steps:
-      - uses: EndBug/label-sync@v2
-        with:
-          source-repo: bitnami/containers
-          delete-other-labels: false
-          token: ${{ secrets.GITHUB_TOKEN }}