Remove unused diffusers/cache_diffusion/pipeline and cuda-python dependency

[jingyu-ml]

cuda-python has mixed license and needs EStaff approval for usage. And till 0.42, it was only used in examples/diffusers/cache_diffusion/pipeline which has not been updated in 9 months and not used anymore hence removing

[coderabbitai]

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📝 Walkthrough

Walkthrough

Removed a version constraint on cuda-python<13 from the diffusers example requirements file. Other dependencies remain unchanged.

Changes

Cohort / File(s)	Summary
Dependency constraint update examples/diffusers/requirements.txt	Removed cuda-python<13 version constraint; other dependencies (nvtx, opencv-python, sentencepiece) remain unchanged.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Title check	⚠️ Warning	The PR title mentions removing 'cuda-python dependency' which aligns with the actual change (removing cuda-python<13), but also references 'diffusers/cache_diffusion/pipeline' which is not present in the changeset.	Update the title to accurately reflect only the actual changes made, such as 'Remove cuda-python dependency from diffusers requirements' to avoid misleading reviewers about the scope of changes.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch jingyux/cuda-python-remove

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.73%. Comparing base (eaf5d7e) to head (021564e).
⚠️ Report is 1 commits behind head on release/0.42.0.

Additional details and impacted files

@@               Coverage Diff               @@
##           release/0.42.0     #984   +/-   ##
===============================================
  Coverage           73.73%   73.73%           
===============================================
  Files                 196      196           
  Lines               20482    20482           
===============================================
  Hits                15102    15102           
  Misses               5380     5380           

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