👷 Update GitHub Actions format (#1363)

.github/workflows/test-backend.yml

@@ -10,17 +10,15 @@ on:
       - synchronize
 
 jobs:
-
   test-backend:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: '3.10'
+          python-version: "3.10"
       - name: Install uv
         uses: astral-sh/setup-uv@v2
         with:
@@ -40,15 +38,3 @@ jobs:
           name: coverage-html
           path: backend/htmlcov
           include-hidden-files: true
-
-  # https://github.com/marketplace/actions/alls-green#why
-  alls-green:  # This job does nothing and is only used for the branch protection
-    if: always()
-    needs:
-      - test-backend
-    runs-on: ubuntu-latest
-    steps:
-      - name: Decide whether the needed jobs succeeded or failed
-        uses: re-actors/alls-green@release/v1
-        with:
-          jobs: ${{ toJSON(needs) }}