Minimal docs to missing experiments

[Edoardo-Pedicillo]

Checklist:

• Reviewers confirm new code works as expected.
• Tests are passing.
• Coverage does not decrease.
• Documentation is updated.
• Compatibility with Qibo modules (Please edit this section if the current pull request is not compatible with the following branches).
  • Qibo: master
  • Qibolab: main
  • Qibolab_platforms_qrc: main

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.50%. Comparing base (dc66a50) to head (301a571).
Report is 12 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1016   +/-   ##
=======================================
  Coverage   97.50%   97.50%           
=======================================
  Files         124      124           
  Lines        9833     9833           
=======================================
  Hits         9588     9588           
  Misses        245      245           

Flag	Coverage Δ
unittests	97.50% <ø> (ø)

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see 3 files with indirect coverage changes

[alecandido]

Nothing serious. For me, it's even fine to merge.

However, assuming @hay-k is right, and the information is already contained in the docstrings (I didn't check explicitly, but I trust him), I'd say that there are two options:

1. improve the description in the docs, and drop the current docstring (we'll delegate more in-depth explanations to the docs)
2. drop the description from the docs, postponing the problem (as for the other protocols here) - the docstring will remain available anyhow

[Edoardo-Pedicillo]

After a discussion with @hay-k , we agreed to remove the docs for the coupler qubit/resonator spectroscopy because it is not fully clear the purposes and results of these experiments. We will eventually add them after an investigation.