Remove stale Github Actions

.github/workflows/stale.yml

@@ -1,34 +0,0 @@
-name: 'Close stale issues and PRs'
-on:
-  schedule:
-    - cron: '30 1 * * *'
-
-permissions:
-  issues: write
-  pull-requests: write
-
-jobs:
-  stale:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/stale@v6
-        with:
-          operations-per-run: 500 # allow to consume half of the 1000 operations per hour limit of GitHub API
-          ascending: true # oldest issues first
-          days-before-stale: 90
-          days-before-close: 60
-          exempt-issue-labels: 'pinned,security'
-          exempt-pr-labels: 'pinned,security'
-          stale-issue-message: 'This issue has been automatically marked as stale because it has not had
-recent activity. It will be closed if no further activity occurs.
-
-If this is still an issue for you, please try to help by debugging it
-further and sharing your results.
-
-Thank you for your contributions.'
-          stale-pr-message: 'This PR has been automatically marked as stale because it has not had
-recent activity. It will be closed if no further activity occurs.
-
-If this is still an issue for you, please try to complete the PR by adding tests and making sure that the CI is green.
-
-Thank you for your contributions.'