fix: remove duplicate setup in gsm8k_rl

[v3nividiv1ci]

Description

This PR removes duplicated valid_dataset loading and duplicated workflow_kwargs / eval_workflow_kwargs construction in examples/math/gsm8k_rl.py. As a commonly referenced entry-point for code walkthroughs, keeping this example clean improves readability and consistency (aligned with gsm8k_sft.py). The duplicated blocks were redundant because later definitions overwrote earlier ones, so this is no functional change.

Related Issue

N/A

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not
  work as expected)
• Documentation update
• Code refactoring (no functional changes)
• Performance improvement
• Test coverage improvement

Checklist

• I have read the Contributing Guide
• I have run formatting tools (pre-commit or manual)
• I have run relevant unit tests and they pass
• I have added tests for new functionality
• I have updated documentation if needed
• My branch is up to date with main
• This PR introduces breaking changes (if yes, fill out details below)
• If this PR changes documentation, I have built and previewed it locally with
  jb build docs
• No critical issues raised by AI reviewers (/gemini review)

Breaking Change Details (if applicable):

N/A

Additional Context

N/A

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[gemini-code-assist]

Summary of Changes

Hello @v3nividiv1ci, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on enhancing the maintainability and clarity of the gsm8k_rl.py example by removing redundant code blocks. The changes specifically target duplicated dataset loading and workflow argument constructions, ensuring that the example remains clean and consistent without altering its behavior.

Highlights

• Redundant Code Removal: Eliminated duplicate loading of valid_dataset and redundant construction of workflow_kwargs and eval_workflow_kwargs in examples/math/gsm8k_rl.py.
• Code Readability and Consistency: Improved the readability and consistency of the gsm8k_rl.py example by removing dead code, aligning it with gsm8k_sft.py.
• No Functional Change: This refactoring introduces no functional changes, as the removed definitions were previously overwritten by later code.

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[gemini-code-assist]

Code Review

This pull request refactors examples/math/gsm8k_rl.py to remove duplicated code. Specifically, it removes redundant definitions of valid_dataset, workflow_kwargs, and eval_workflow_kwargs. The remaining calls to get_custom_dataset are updated to use keyword arguments, which improves readability. The changes are correct and improve the clarity and maintainability of the example script. This is a good cleanup with no functional changes, as described.

[garrett4wade]

LGTM!