drop extra stale issue workflow file (#4175)

.github/workflows/stale.yaml

@@ -1,31 +0,0 @@
-name: 'Close stale'
-on:
-  schedule:
-  - cron: '* * * * *' # Runs everyday
-
-jobs:
-  stale:
-    runs-on: 'ubuntu-latest'
-    steps:
-    - uses: 'actions/stale@v3'
-      with:
-        repo-token: '${{ secrets.GITHUB_TOKEN }}' # No need to setup
-
-        stale-issue-message: |-
-          This issue is stale because it has been open for 90 days with no
-          activity. It will automatically close after 30 more days of
-          inactivity. Reopen the issue with `/reopen`.Mark the issue as
-          fresh by adding the comment `/remove-lifecycle stale`.
-        stale-issue-label: 'lifecycle/stale'
-        exempt-issue-labels: 'lifecycle/frozen'
-
-        stale-pr-message: |-
-          This Pull Request is stale because it has been open for 90 days with
-          no activity. It will automatically close after 30 more days of
-          inactivity. Reopen with `/reopen`.Mark as fresh by adding the
-          comment `/remove-lifecycle stale`.
-        stale-pr-label: 'lifecycle/stale'
-        exempt-pr-labels: 'lifecycle/frozen'
-
-        days-before-stale: 90
-        days-before-close: 30