chore(ci): remove the stale-issue auto-closer (#7018)

.github/workflows/stale.yml

@@ -1,32 +0,0 @@
-name: Close Stale Issues
-on:
-  schedule:
-    - cron: 0 6 * * *
-  workflow_dispatch: {}
-
-permissions:
-  issues: write
-  pull-requests: write
-
-concurrency:
-  group: ${{ github.workflow }}
-  cancel-in-progress: false
-
-jobs:
-  stale_issues:
-    name: Close Stale Issues
-    # actions/stale is pure API work with no checkout, so ubuntu-slim's container is
-    # sufficient. Its 15-minute platform cap matches the timeout already set here.
-    runs-on: ubuntu-slim
-    timeout-minutes: 15
-    if: github.repository == 'meshtastic/Meshtastic-Android'
-
-    steps:
-      - name: Stale PR+Issues
-        uses: actions/stale@4391f3da665fdf50b6810c1a66712fb9ba21aa93 # v11.0.0
-        with:
-          days-before-stale: 30
-          stale-issue-message: This issue has not had any comment or update in the last 30 days. If it is still relevant, please post update comments. If no comments are made, this issue will be closed in 7 days.
-          exempt-issue-labels: 'has sponsor,needs sponsor,help wanted,backlog,security issue,l10n,dependencies' 
-          exempt-pr-labels: 'has sponsor,needs sponsor,help wanted,backlog,security issue,l10n,dependencies'
-          operations-per-run: 100