Remove coverage status badge from README

[whart222]

Removed coverage badge from README.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.61%. Comparing base (555b7bd) to head (7e6eb9c).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #155   +/-   ##
=======================================
  Coverage   82.61%   82.61%           
=======================================
  Files         100      100           
  Lines        6102     6102           
  Branches      620      620           
=======================================
  Hits         5041     5041           
  Misses        925      925           
  Partials      136      136           

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