Fix deploy workflow

Author: philip-linaro

.github/workflows/deploy_preview.yml

@@ -47,12 +47,6 @@ jobs:
           ref: ${{ github.event.workflow_run.head_sha }}
           fetch-depth: "0"
 
-      - name: Create local main branch
-        run: git fetch origin main:main || true
-
-      - name: Merge test branch
-        uses: linaro-its/merge-test-branch@v2.7
-
       - name: Set up Node.js
         uses: actions/setup-node@v6
         with: