chore(dspy): remove unused to_openai_text_request mapper and helpers

[detail-app]

Remove the to_openai_text_request function and its cascading dead code
(messages_to_text_prompt, text_config_kwargs, the section header, and the
corresponding docstring/__all__ entries). These symbols had no callers
anywhere in the codebase, tests, or docs. The actual text-completion path in
dspy/clients/lm.py (litellm_text_completion/alitellm_text_completion)
builds its prompt inline and does not use this mapper, so it never wired up
since the module was introduced.

📝 Changes Description

This MR/PR contains the following changes:

• Removed to_openai_text_request (the only __all__ symbol with zero callers anywhere)
• Removed messages_to_text_prompt and text_config_kwargs (their sole consumer was to_openai_text_request)
• Removed the "DSPy request -> OpenAI text completions" section header
• Updated the module docstring and __all__ to drop the references

✅ Contributor Checklist

• Pre-Commit checks are passing (locally and remotely)
• Title of your PR / MR corresponds to the required format
• Commit message follows required format {label}(dspy): {message}

⚠️ Warnings

Detail: Dead Code

History

• Last materially changed May 2026 (Introduce normalized LM boundary for adapters stanfordnlp/dspy#9802 @MaximeRivest)

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Dead Code PRs can be configured here.

[greptile-apps]

Greptile Summary

Removes an unused OpenAI text-completion request mapper and its private helper functions.

• Updates the module documentation and __all__ export list.
• Leaves the active text-completion execution paths unchanged.

Confidence Score: 5/5

The PR appears safe to merge because the removed symbols are unused and the active text-completion paths remain intact.

No actionable failure remains; repository-wide reference checks found no consumers, and both synchronous and asynchronous text-completion functions independently construct their prompts.

Important Files Changed

Filename	Overview
dspy/clients/openai_format.py	Cleanly removes an unreferenced text-request mapper, its exclusively used helpers, and associated documentation/export entries.

_{Reviews (1): Last reviewed commit: "chore(dspy): remove unused to_openai_tex..." | Re-trigger Greptile}