ci: remove stale.yml workflow

.github/workflows/stale.yml

@@ -1,39 +0,0 @@
----
-name: Stale
-
-on:
-  schedule:
-    - cron: "0 8 * * *"
-  workflow_dispatch:
-
-jobs:
-  stale:
-    name: 🧹 Clean up stale issues and PRs
-    runs-on: ubuntu-latest
-    steps:
-      - name: 🚀 Run stale
-        uses: actions/stale@v3
-        with:
-          repo-token: ${{ secrets.GITHUB_TOKEN }}
-          days-before-stale: 30
-          days-before-close: 7
-          remove-stale-when-updated: true
-          stale-issue-label: "stale"
-          exempt-issue-labels: "no-stale,help-wanted"
-          stale-issue-message: >
-            There hasn't been any activity on this issue recently, so we
-            clean up some of the older and inactive issues.
-
-            Please make sure to update to the latest version and
-            check if that solves the issue. Let us know if that works for you
-            by leaving a comment 👍.
-
-            This issue has now been marked as stale and will be closed if no
-            further activity occurs. Thanks!
-          stale-pr-label: "stale"
-          exempt-pr-labels: "no-stale"
-          stale-pr-message: >
-            There hasn't been any activity on this pull request recently. This
-            pull request has been automatically marked as stale because of that
-            and will be closed if no further activity occurs within 7 days.
-            Thank you for your contributions.