increase state coverage, delete unused functions;

[Eikix]

closes #714

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.47%. Comparing base (efd5d86) to head (593d432).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #715      +/-   ##
==========================================
+ Coverage   71.29%   71.47%   +0.17%     
==========================================
  Files          87       87              
  Lines       19125    19080      -45     
==========================================
+ Hits        13636    13637       +1     
+ Misses       5489     5443      -46     

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