chore: Remove field annotation (long since replaced by TypeVoiew).

[DanCardin]

Step 3 in #256

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.70%. Comparing base (1a04e29) to head (35743c8).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #256      +/-   ##
==========================================
- Coverage   99.70%   99.70%   -0.01%     
==========================================
  Files          26       26              
  Lines        2717     2715       -2     
  Branches      598      598              
==========================================
- Hits         2709     2707       -2     
  Misses          7        7              
  Partials        1        1              

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