Remove unused unstable dependencies

.github/workflows/ci.yaml

@@ -43,6 +43,7 @@ jobs:
         if: matrix.experimental == true
         shell: bash -l {0}
         run: |
+          python -c "import xarray.backends"; \
           python -m pip install versioneer pkgconfig; \
           python -m pip install \
           -f https://pypi.anaconda.org/scientific-python-nightly-wheels/simple/ \
@@ -57,8 +58,6 @@ jobs:
           git+https://github.com/dask/distributed \
           git+https://github.com/mapbox/rasterio \
           git+https://github.com/pydata/bottleneck \
-          git+https://github.com/h5py/h5py \
-          git+https://github.com/h5netcdf/h5netcdf \
           git+https://github.com/zarr-developers/zarr \
           git+https://github.com/pydata/xarray;
           python -m pip install -e . --no-deps --no-build-isolation;
@@ -74,9 +73,7 @@ jobs:
       - name: Run unit tests
         shell: bash -l {0}
         run: |
-          python -c "from netCDF4 import Dataset"
-          python -c "import h5py"
-          python -c "import h5netcdf"
+          python -c "import xarray.backends"
           pytest --cov=trollimage trollimage/tests --cov-report=xml --cov-report=
 
       - name: Upload unittest coverage to Codecov