Revert "Use linux.large.arc for stale workflow (#115440)"

This reverts commit dadb3694ffaa2a0bfe78516c294a46566430c1ad.

Reverted https://github.com/pytorch/pytorch/pull/115440 on behalf of https://github.com/DanilBaibak due to Did not merge properly ([comment](https://github.com/pytorch/pytorch/pull/115440#issuecomment-1852126050))
diff --git a/.github/actionlint.yaml b/.github/actionlint.yaml
index 58cdbd2..955d6a7 100644
--- a/.github/actionlint.yaml
+++ b/.github/actionlint.yaml
@@ -3,7 +3,6 @@
     - linux.20_04.4x
     - linux.20_04.16x
     - linux.large
-    - linux.large.arc
     - linux.2xlarge
     - linux.4xlarge
     - linux.12xlarge
diff --git a/.github/workflows/stale.yml b/.github/workflows/stale.yml
index 39fe67d..fb29e39 100644
--- a/.github/workflows/stale.yml
+++ b/.github/workflows/stale.yml
@@ -16,12 +16,11 @@
   schedule:
     # Run hourly.
     - cron: 30 * * * *
-  workflow_dispatch:
 
 jobs:
   stale:
     if: ${{ github.repository == 'pytorch/pytorch' }}
-    runs-on: linux.large.arc
+    runs-on: ubuntu-latest
 
     steps:
       - uses: actions/github-script@v6