Fix Documentation - readthedoc v2

[arnaudbore]

Quick description

fix documentation - verbose call metadata makes readthedoc crash

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Type of change

Check the relevant options.

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

Provide data, screenshots, command line to test (if relevant)

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Checklist

• [x] My code follows the style guidelines of this project (run autopep8)
• [x] I added relevant citations to scripts, modules and functions docstrings and descriptions
• [x] I have performed a self-review of my code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] I moved all functions from the script file (except the argparser and main) to scilpy modules
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 68.98%. Comparing base (82fdf5f) to head (42813dd).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #923 +/- ## ========================================== - Coverage 68.99% 68.98% -0.01% ========================================== Files 388 388 Lines 20923 20918 -5 Branches 3220 3220 ========================================== - Hits 14436 14431 -5 Misses 5164 5164 Partials 1323 1323 ``` | [Components](https://app.codecov.io/gh/scilus/scilpy/pull/923/components?src=pr&el=components&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=scilus) | Coverage Δ | | |---|---|---| | [Scripts](https://app.codecov.io/gh/scilus/scilpy/pull/923/components?src=pr&el=component&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=scilus) | `71.48% <ø> (ø)` | | | [Library](https://app.codecov.io/gh/scilus/scilpy/pull/923/components?src=pr&el=component&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=scilus) | `64.69% <ø> (-0.03%)` | :arrow_down: |