remove unused intersphinx configs

[jameslamb]

Yesterday's nightly build on main failed like this:

loading intersphinx inventory 'scipy' from https://docs.scipy.org/doc/scipy/objects.inv ...
loading intersphinx inventory 'sklearn' from https://scikit-learn.org/stable/objects.inv ...
loading intersphinx inventory 'treelite' from https://treelite.readthedocs.io/en/latest/objects.inv ...
WARNING: failed to reach any of the inventories with the following issues:
intersphinx inventory 'https://docs.scipy.org/doc/scipy/objects.inv' not fetchable due to <class 'requests.exceptions.ConnectTimeout'>: HTTPSConnectionPool(host='docs.scipy.org', port=443): Max retries exceeded with url: /doc/scipy/objects.inv (Caused by ConnectTimeoutError(<HTTPSConnection(host='docs.scipy.org', port=443) at 0x7a5853ca11d0>, 'Connection to docs.scipy.org timed out. (connect timeout=None)'))
building [mo]: targets for 0 po files that are out of date

(build link)

Because of docs-hosting issues with scipy:

• DOC: Intersphinx inventory not available scipy/scipy#24950
• Website performance issues scipy/docs.scipy.org#102

This PR removes intersphinx configuration for cudf and scipy... nvForest doesn't use either, and removing those reduces the risk of similar failures in the future.

Similar to rapidsai/cuml#7935

[jcrist]

[coderabbitai]

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📥 Commits

Reviewing files that changed from the base of the PR and between c246e07 and dcb02b7.

📒 Files selected for processing (1)

• docs/source/conf.py

💤 Files with no reviewable changes (1)

• docs/source/conf.py

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📝 Walkthrough

Summary by CodeRabbit

• Documentation
  • Updated documentation configuration by removing external library cross-reference mappings for cuDF and SciPy.

Walkthrough

Two entries ("cudf" and "scipy") were removed from the intersphinx_mapping dictionary in the Sphinx configuration file. The remaining mappings for "numpy", "python", "sklearn", and "treelite" remain unchanged.

Changes

Cohort / File(s)	Summary
Sphinx Configuration docs/source/conf.py	Removed "cudf" and "scipy" entries from intersphinx_mapping dictionary.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Suggested reviewers

• hcho3

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely summarizes the main change: removing unused intersphinx configurations from the documentation setup.
Description check	✅ Passed	The description is directly related to the changeset, explaining why the intersphinx configs for cudf and scipy were removed due to build failures and docs-hosting issues.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

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[jameslamb]

/merge