Remove unnecessary _is_node optimization and clean up type hints.

[daniel-shields]

No description provided.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.87%. Comparing base (9924f16) to head (d4ce856).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #26      +/-   ##
==========================================
- Coverage   95.88%   95.87%   -0.01%     
==========================================
  Files          45       45              
  Lines        1702     1699       -3     
  Branches      265      265              
==========================================
- Hits         1632     1629       -3     
  Misses         45       45              
  Partials       25       25              

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