Documentation creation does not work on Windows

[Matthew-Boyd]

The error stems from no imagemagick package being available in the specified channels. Using the only available Windows version, which was cross-compiled via mingw-w64, does not immediately work either.

When running conda env create, the error gotten is:

Retrieving notices: ...working... done
Channels:

• conda-forge
  Platform: win-64
  Collecting package metadata (repodata.json): done
  Solving environment: failed

PackagesNotFoundError: The following packages are not available from current channels:

• imagemagick

Current channels:

• https://conda.anaconda.org/conda-forge/win-64

To search for alternate channels that may provide the conda package you're
looking for, navigate to

https://anaconda.org

and use the search bar at the top of the page.

[ianhbell]

Two solutions:

1. Build the docs on non-windows platform (e.g., in a docker container)
2. Install imagemagick yourself and remove from conda environment.yml file