Remove Binpickle from tests and docs

[mdekstrand]

This removes Binpickle from the tests and documentation, as it doesn't work well with Torch at this point. Closes #422.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.96%. Comparing base (19f933e) to head (7f63eb0).
Report is 593 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #423   +/-   ##
=======================================
  Coverage   90.96%   90.96%           
=======================================
  Files          45       45           
  Lines        3077     3077           
=======================================
  Hits         2799     2799           
  Misses        278      278           

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