Remove GitHub workflow

It's currently broken.

.github/workflows/python.yml

@@ -1,28 +0,0 @@
-name: Python Library
-
-on: [push, pull_request]
-
-jobs:
-  build:
-
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10"]
-    steps:
-    - uses: actions/checkout@v1
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
-      with:
-        python-version: ${{ matrix.python-version }}
-    - name: Set up env
-      run: |
-        python -m pip install --upgrade pip
-        pip install tox
-    - name: Lint with flake8
-      run: |
-        tox -e flake
-    - name: Test with pytest
-      run: |
-        # use "py", which is the default python version
-        tox -e py