chore: remove stalebot

.github/workflows/stale.yml

@@ -1,22 +0,0 @@
-name: Mark stale issues and pull requests
-
-on:
-  schedule:
-  - cron: '38 16 * * *'
-
-jobs:
-  stale:
-
-    runs-on: ubuntu-latest
-    permissions:
-      issues: write
-      pull-requests: write
-
-    steps:
-    - uses: actions/stale@v9
-      with:
-        repo-token: ${{ secrets.GITHUB_TOKEN }}
-        stale-issue-message: "This issue hasn't been updated in a while. If it's still reproducing, please comment to let us know. Thank you!"
-        stale-pr-message: "This pull request hasn't been updated in a while, and is being marked as stale. Thanks!"
-        stale-issue-label: 'no-issue-activity'
-        stale-pr-label: 'no-pr-activity'