Remove setup job (#4279)

.github/workflows/staged-rollout-desktop.yml

@@ -15,26 +15,9 @@ defaults:
     shell: bash
 
 jobs:
-  setup:
-    name: Setup
-    runs-on: ubuntu-22.04
-    steps:
-      - name: Checkout repo
-        uses: actions/checkout@2541b1294d2704b0964813337f33b291d3f8596b
-
-      - name: Branch check
-        run: |
-          if [[ "$GITHUB_REF" != "refs/heads/rc" ]] && [[ "$GITHUB_REF" != "refs/heads/hotfix-rc-desktop" ]]; then
-            echo "==================================="
-            echo "[!] Can only increase rollout from the 'rc' or 'hotfix-rc-desktop' branches"
-            echo "==================================="
-            exit 1
-          fi
-
   rollout:
     name: Update Rollout Percentage
     runs-on: ubuntu-22.04
-    needs: setup
     steps:
       - name: Login to Azure
         uses: Azure/login@ec3c14589bd3e9312b3cc8c41e6860e258df9010