remove flake and conda, just run on windows

.github/workflows/windows_conda_testing.yaml

@@ -14,35 +14,6 @@ jobs:
 
     steps:
     - uses: actions/checkout@v2
-    - name: Set up Python
-      uses: actions/setup-python@v2
-      with:
-        python-version: 3.8
-    - name: Install dependencies
-      run: |
-        python --version
-        C:\Miniconda\condabin\conda.bat env update --file environment.yml --name base
-        python --version
-        C:\Miniconda\condabin\conda.bat init powershell
-        python --version
-    - name: Set up Python
-      uses: actions/setup-python@v2
-      with:
-        python-version: 3.8
-    - name: Lint with flake8
-      run: |
-        # Activate the base environment
-        python --version
-        C:\Miniconda\condabin\conda.bat activate base
-        python --version
-        C:\Miniconda\condabin\conda.bat install flake8
-        python --version
-        # stop the build if there are Python syntax errors or undefined names
-        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
-        python --version
-        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
-        python --version
     - name: Set up Python
       uses: actions/setup-python@v2
       with: