update: build test에서 setup-python action를 삭제하다

Author: 404Vector

.github/workflows/build_test.yml

@@ -17,9 +17,5 @@ jobs:
       image: python:${{ matrix.python-version }}
     steps:
     - uses: actions/checkout@v3
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v3
-      with:
-        python-version: ${{ matrix.python-version }}
     - name: Build package
       run: python build_package.py