Remove examples/diffusers/eval example

[jingyu-ml]

What does this PR do?

Type of change: Documentation / example removal

Removes the unmaintained examples/diffusers/eval/ image-quality evaluation example (ImageReward / CLIP-IQA / CLIP metrics), which is no longer maintained. Also cleans up the now-dangling references to it in examples/diffusers/README.md:

• the intro sentence clause about evaluation scripts,
• the table-of-contents "Evaluate Accuracy" row,
• the per-subsection requirements.txt note (example updated from eval to fastgen, distillation),
• the entire "Evaluate Accuracy" section.

Scope is intentionally limited to the diffusers example. The unrelated examples/llm_ptq "Evaluate Accuracy" section is not touched.

Usage

N/A — this removes example scripts; there are no library API changes.

Testing

N/A — deletion of example scripts plus documentation cleanup. Verified that examples/diffusers/README.md has no remaining references to the deleted eval/ directory, no broken section anchors, no trailing whitespace, and the final newline is intact.

Before your PR is "Ready for review"

• Is this change backward compatible?: ✅ — only removes example scripts under examples/diffusers/eval/; no public modelopt API is affected.
• If you copied code from any other sources or added a new PIP dependency, did you follow guidance in CONTRIBUTING.md: N/A — no code copied; this removes the example's own requirements.txt.
• Did you write any new necessary tests?: N/A — removal only.
• Did you update Changelog?: N/A — example/doc removal, not a library feature or API change.
• Did you get Claude approval on this PR?: N/A — trivial example/doc removal.

Additional Information

Deletes examples/diffusers/eval/ (5 files) and trims its references from the diffusers README.

🤖 Generated with Claude Code

Summary by CodeRabbit

Release Notes

• Documentation

  • Updated Diffusers Model Optimizations documentation to remove evaluation-related references.

• Chores

  • Removed evaluation scripts and metric computation functionality from Diffusers examples.

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Enterprise

Run ID: 2ff75991-575a-4504-8748-cfcf4d8a03d5

📥 Commits

Reviewing files that changed from the base of the PR and between dd49a46 and f352498.

📒 Files selected for processing (6)

• examples/diffusers/README.md
• examples/diffusers/eval/main.py
• examples/diffusers/eval/metrics/imagereward.py
• examples/diffusers/eval/metrics/multimodal.py
• examples/diffusers/eval/requirements.txt
• examples/diffusers/eval/utils.py

💤 Files with no reviewable changes (5)

• examples/diffusers/eval/utils.py
• examples/diffusers/eval/metrics/imagereward.py
• examples/diffusers/eval/main.py
• examples/diffusers/eval/metrics/multimodal.py
• examples/diffusers/eval/requirements.txt

---

📝 Walkthrough

Walkthrough

The Diffusers example documentation is updated to remove evaluation feature references. The README intro sentence, navigation table, and installation guidance are modified to eliminate mentions of evaluation scripts and metrics. The full "Evaluate Accuracy" section is then deleted entirely from the document.

Changes

Diffusers evaluation documentation removal

Layer / File(s)	Summary
Documentation navigation and guidance updates examples/diffusers/README.md	Top-level description removes the clause about providing evaluation scripts; the "Evaluate Accuracy" link is removed from the centered navigation table; and the Local Installation note is updated to reference subsections like fastgen and distillation instead of eval.
Evaluate Accuracy section deletion examples/diffusers/README.md	The entire "## Evaluate Accuracy" section—including requirements installation instructions, JSON input format specification, evaluation command usage, and sample results table—is deleted from the document.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 6

✅ Passed checks (6 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'Remove examples/diffusers/eval example' directly and accurately describes the primary change: deletion of the examples/diffusers/eval directory and related references.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Security Anti-Patterns	✅ Passed	Diff vs origin/main for PR changes shows only README edits and deletions under examples/diffusers/eval; searched diff contains none of torch.load(weights_only=False), numpy.load(allow_pickle=True),...

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch remove-diffusers-eval-example

---

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 68.24%. Comparing base (dd49a46) to head (f352498).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1694      +/-   ##
==========================================
+ Coverage   67.72%   68.24%   +0.52%     
==========================================
  Files         511      511              
  Lines       56168    56168              
==========================================
+ Hits        38037    38333     +296     
+ Misses      18131    17835     -296     

Flag	Coverage Δ
examples	41.81% <ø> (+0.50%)	⬆️
unit	54.33% <ø> (ø)

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[jingyu-ml]

/ok to test f352498

[kevalmorabia97]

@jingyu-ml please update Changelog to mention removal of this example