Remove specialized CodeQL workflow (default one is good) etc.

[andreibancioiu]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.65%. Comparing base (ce2a5d2) to head (4e79ee2).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #137   +/-   ##
=======================================
  Coverage   61.65%   61.65%           
=======================================
  Files          48       48           
  Lines        3792     3792           
=======================================
  Hits         2338     2338           
  Misses       1302     1302           
  Partials      152      152           

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