chore: update stale workflow and remove unused repo-token

Author: bslatyer

.github/workflows/stale.yml

@@ -23,5 +23,4 @@ jobs:
           stale-issue-message: "This issue is stale because it has been open for 30 days with no activity."
           stale-pr-message: "This pull request is stale because it has been open for 30 days with no activity."
           close-issue-message: "This issue was closed because it has been inactive for 14 days since being marked as stale."
-          close-pr-message: "This pull request was closed because it has been inactive for 14 days since being marked as stale."
-          repo-token: ${{ secrets.STALE_PAT }}
+          close-pr-message: "This pull request was closed because it has been inactive for 14 days since being marked as stale."