fix: remove redundant checkout step in workflow

Author: IShix-g

.github/workflows/check-and-upload-package.yaml

@@ -83,9 +83,6 @@ jobs:
     needs: check-package
     runs-on: ubuntu-22.04
     steps:
-      - name: Checkout code
-        uses: actions/checkout@v4
-
       - name: Handle PackageExporter Upload
         if: ${{ needs.check-package.outputs.file-present != '1' }}
         env: