Remove redundant checkout step in build wheels workflow

Author: RaulSimpetru

.github/workflows/build-wheels.yml

@@ -110,8 +110,6 @@ jobs:
         python-version: ["3.12"]
 
     steps:
-      - uses: actions/checkout@v4
-
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5
         with: