Suppress mentions of ipython_genutils (7 years deprecated)

[Carreau]

This should not be a dependency of anything for the last ~7 years. If it is; it is a bug in the package.

I think that sage is one of the last pieces of software that mention it And might be the reason we still recieve request to remove nose as a testing framework to package it in opensuse ?

---

I don't have much clue what I'm doing, I grep-ed through all the files and removed any mentions, maybe some of those files need to be regenerated ?

📝 Checklist

• The title is concise and informative.
• The description explains in detail what this PR is about.
• I have linked a relevant issue or discussion.
• I have created tests covering the changes.
• I have updated the documentation and checked the documentation preview.

⌛ Dependencies

[Carreau]

(also sending to ee if something breaks, and what need to be patched)

[github-actions]

Documentation preview for this PR (built with commit 36835ca; changes) is ready! 🎉
This preview will update shortly after each push to this PR.

[fchapoton]

looks good, thanks a lot

[fchapoton]

let's wait at least for the tests to finish

[fchapoton]

It seems that we could use

./bootstrap-conda && tox -e update_conda_lock

but maybe it is enough to do this by hand.

@tobiasdiez please tell us if the merge request is ok like it is now

[tobiasdiez]

The conda lock files don't need to be changed by hand, and in fact ipython_genutils will be installed in the env anyway because its pulled in as a dependency of some other package.

I cannot really speak about the changes in sage-the-distro but it appears to me that ipympl does still depends on ipython_genutils (only removed in matplotlib/ipympl@564cf6d, which is not yet released).

[Carreau]

Yeah, I just realized it is needed by spyder as well as it vendors an old dependency.
It's annoying but it will take a few more month to be removable.

[Carreau]

(closing for now)