small change to appveyor CI script

appveyor.yml

@@ -20,11 +20,11 @@ build_script:
   - CMD: SET
   - conda config --set always_yes yes
   - conda update conda
-  - conda install -c conda-forge python=3.8 numpy gdal pytest meshpy cython scipy netcdf4=1.5.6 matplotlib dill future gitpython utm backports.zoneinfo pymetis brotlipy mpi4py msmpi Pmw
+  - conda install -c conda-forge python=3.8 numpy gdal pytest meshpy cython scipy netcdf4 matplotlib dill future gitpython utm backports.zoneinfo pymetis mpi4py msmpi Pmw
   # setup for mingw compiler 
   - conda install -c conda-forge libpython m2w64-toolchain
   # there was a bug with distutil not picking mingw comiler for anuga
-  - cp windows_setup.cfg setup.cfg
+  #- cp windows_setup.cfg setup.cfg
   # install locally so that the pytest will work
   - pip install -e .