ci: disable stale

.github/workflows/stale.yml

@@ -1,23 +0,0 @@
-# https://docs.github.com/en/actions/managing-issues-and-pull-requests/closing-inactive-issues
-# https://github.com/actions/stale
-
-name: close inactive issues
-on:
-  schedule:
-    - cron: '30 1 * * *'
-
-jobs:
-  close-issues:
-    runs-on: ubuntu-latest
-    permissions:
-      issues: write
-      pull-requests: write
-    steps:
-      - uses: actions/stale@v5
-        with:
-          exempt-issue-labels: help wanted
-          exempt-all-assignees: true
-          stale-issue-message: 'This issue is stale because it has been open for 60 days with no activity.'
-          close-issue-message: 'This issue was closed because it has been inactive for 7 days since being marked as stale.'
-          days-before-pr-stale: -1
-          days-before-pr-close: -1