Remove stale bot

.github/workflows/stale.yml

@@ -1,18 +0,0 @@
-name: 'Close stale issues and PRs'
-on:
-  schedule:
-    - cron: '30 5 * * *'
-  workflow_dispatch:
-
-jobs:
-  stale:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/stale@v4
-        with:
-          stale-issue-message: 'This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 15 days.'
-          days-before-stale: 60
-          days-before-close: 15
-          exempt-all-milestones: true
-          exempt-issue-labels: 'pinned,help wanted,enhancement,bug'
-          exempt-pr-labels: 'pinned'