remove Windows tests from CI

[zacharyburnett]

closes #162

since jwst and romancal and hstcal do not support Windows, we might as well stop testing on Windows here

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 69.83%. Comparing base (e074807) to head (c9c75de).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #163   +/-   ##
=======================================
  Coverage   69.83%   69.83%           
=======================================
  Files          24       24           
  Lines        1618     1618           
=======================================
  Hits         1130     1130           
  Misses        488      488           

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[braingram]

Thanks! Would you also add a note to the readme similar to jwst and romancal:

> [!NOTE]
> Linux and MacOS platforms are tested and supported.  Windows is not currently supported.

and a changelog entry?

[braingram]

Thanks!