BLD: No pip deps on top of conda

.github/workflows/test-conda.yml

@@ -31,7 +31,7 @@ jobs:
         run: |
           conda create --name test python=${{ matrix.python }} pytest numpy scipy matplotlib pandas pytables numba scikit-learn pyyaml looseversion pip
           conda activate test
-          pip install -v -e .
+          pip install -v --no-deps -e .
           python -V
           conda info
           conda list