Remove manual cfile install in workflow

Author: cogu

.github/workflows/python-package.yml

@@ -21,20 +21,13 @@ jobs:
     steps:
     - name: Checkout
       uses: actions/checkout@v4
-    - name: Checkout cfile repo
-      uses: actions/checkout@v4
-      with:
-        repository: cogu/cfile
-        ref: v0.3.2
-        path: cfile_0.3
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
       run: |
         python -m pip install flake8
-        python -m pip install ./cfile_0.3
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
     - name: Run unit tests
       run: |