Remove Maxima pexpect interface

[tobiasdiez]

Fixes #17753 and fixes #30071

📝 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

[github-actions]

Documentation preview for this PR (built with commit 47e874e; changes) is ready! 🎉
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[tobiasdiez]

Tests are green, so this is now ready for review.

[dimpase]

is this a total removal, or only making it optional?

IIRC maxima pexpect is still used in few places in sagelib, because the glue code needed for library maxima is missing.

@nbruin ought to know the details. There is somewhere an issue tracking the work to be done - I recall looking into it, and being unable to set an actionable plan towards completion of this task, as the API is very opaque and undocumented

[vincentmacri]

Sorry, but I don't think I'm familiar enough with Maxima or how Sage interfaces to external libraries to review this. This doesn't appear to significantly touch any parts of Sage that I've worked on/with either. Was there any particular part you wanted me to look at?

[tobiasdiez]

is this a total removal, or only making it optional?

IIRC maxima pexpect is still used in few places in sagelib, because the glue code needed for library maxima is missing.

It's a complete removal of the pexpect interface for maxima. There were a few places that still used it, but they where quite easy to migrate.

Sorry, but I don't think I'm familiar enough with Maxima or how Sage interfaces to external libraries to review this. This doesn't appear to significantly touch any parts of Sage that I've worked on/with either. Was there any particular part you wanted me to look at?

I didn't knew which to tag for review and github was suggesting you. Sorry for the noise.