The GH action-based tests use the anaconda defaults channel. However, MDAnalysis' installation only needs conda-forge, their terms of service are problematic, and having an additional channel slows down package resolution.
Therefore, we should remove the defaults channel from CI.
The GH action-based tests use the anaconda defaults channel. However, MDAnalysis' installation only needs conda-forge, their terms of service are problematic, and having an additional channel slows down package resolution.
Therefore, we should remove the defaults channel from CI.