Clean-up Readme,CodeCov update

[ystefinko]

• update codecov major version
• claen old jobs which are not in GtiHub anymore.

Relates-To: MINOR

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.26%. Comparing base (478cb38) to head (b3ff518).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1616      +/-   ##
==========================================
+ Coverage   80.18%   80.26%   +0.07%     
==========================================
  Files         348      348              
  Lines       13883    13882       -1     
  Branches     1483     1483              
==========================================
+ Hits        11132    11141       +9     
+ Misses       2150     2145       -5     
+ Partials      601      596       -5     

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