Fix bogus no_op implementation

[mraspaud]

This PR reverts most of #2933, and slightly improve the documentation.

Thanks to @ameraner and @gerritholl for making me realise I was wrong :)

• Code removed
• Fully documented

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.11%. Comparing base (5634073) to head (d62b5d2).
Report is 282 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2939      +/-   ##
==========================================
+ Coverage   96.08%   96.11%   +0.03%     
==========================================
  Files         375      377       +2     
  Lines       54615    55067     +452     
==========================================
+ Hits        52478    52929     +451     
- Misses       2137     2138       +1     

Flag	Coverage Δ
behaviourtests	3.95% <ø> (-0.03%)	⬇️
unittests	96.21% <ø> (+0.02%)	⬆️

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[ameraner]

Thanks, it's a good addition to have a pre-defined no-op enhancement in generic.yaml!

[coveralls]

Pull Request Test Coverage Report for Build 11384945788

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
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• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.001%) to 96.212%

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Totals
Change from base Build 11381112172:	-0.001%
Covered Lines:	53167
Relevant Lines:	55260

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💛 - Coveralls