fix: remove pointless py test requirement

[s-t-e-v-e-n-k]

Proposed Changes

py (as in pylib) is npt actually used, so stop installing it.

Checklist

• CHANGELOG.md updated
• Rebased/mergeable
• A test has been added if appropriate
• pytest tests completes successfully
• Commit messages are conventional
• Sign CLA (if not already signed)

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.46%. Comparing base (1d8c3df) to head (4e809c7).
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Additional details and impacted files

@@           Coverage Diff           @@
##           master     #718   +/-   ##
=======================================
  Coverage   90.46%   90.46%           
=======================================
  Files          40       40           
  Lines        3555     3555           
=======================================
  Hits         3216     3216           
  Misses        339      339           

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