Revert "Rework auto-merge for Steward's PRs. (#337)" (#338)

This reverts commit 985cf8e.

Author: houcros

.github/workflows/automatic-merge.yaml

@@ -0,0 +1,17 @@
+name: Scala Steward automatic merge
+on: pull_request
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  scala-steward-auto-merge:
+    runs-on: ubuntu-latest
+    if: ${{ github.actor == 'scala-steward-for-moia[bot]' }}
+    steps:
+      - name: Enable auto-merge for Scala Steward PRs
+        run: gh pr merge --auto --squash "$PR_URL"
+        env:
+          PR_URL: ${{github.event.pull_request.html_url}}
+          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}

.github/workflows/scala-steward.yml

@@ -15,14 +15,10 @@ jobs:
         with:
           app_id: 162267
           private_key: ${{ secrets.SCALA_STEWARD_APP_PRIVATE_KEY }}
+
       - name: Launch Scala Steward
         uses: scala-steward-org/scala-steward-action@v2
         with:
           github-token: ${{ steps.generate-token.outputs.token }}
           author-name: scala-steward
           author-email: 162267+scala-steward-for-moia[bot]@users.noreply.github.com
-      - name: Enable auto-merge
-        run: gh pr merge --auto --squash "$PR_URL"
-        env:
-          PR_URL: ${{github.event.pull_request.html_url}}
-          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}