Remove 'return None' from call()

[sentilesdal]

This is unecessary and causes pylint warnings.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (0723d8a) 72.85% compared to head (2c89577) 72.85%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #53   +/-   ##
=======================================
  Coverage   72.85%   72.85%           
=======================================
  Files          20       20           
  Lines         851      851           
=======================================
  Hits          620      620           
  Misses        231      231           

Flag	Coverage Δ
unittests	72.85% <ø> (ø)

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