Revert "fix: display served_model_name in /v1/models"

[CatherineSue]

Reverts #13063

The PR did not pass CI lint check.

[gemini-code-assist]

Summary of Changes

Hello @CatherineSue, 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 performs a complete revert of a previous change (#13063) that attempted to introduce and display a served_model_name. The decision to revert was made because the original implementation failed CI lint checks and was deemed an incorrect approach. The PR effectively rolls back all associated code, ensuring the codebase returns to its state before the problematic change was introduced.

Highlights

• Revert Previous Change: This pull request fully reverts the changes introduced in fix: display served_model_name in /v1/models #13063, which aimed to display the served_model_name in the /v1/models endpoint.
• Reason for Revert: The original pull request failed CI lint checks and was identified as an incorrect implementation, necessitating this rollback.
• Code Removal: All code related to served_model_name, including its field in the ServerInfo struct and its usage in model identification and metadata discovery logic, has been removed.

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[gemini-code-assist]

Code Review

This pull request reverts a previous change that introduced the served_model_name field. The revert removes the field from the ServerInfo struct and its handling in the HTTP discovery path. However, the revert appears to be incomplete. The CreateWorkerStep step still attempts to derive a model_id from served_model_name, which will no longer be present in the labels for HTTP workers. This could lead to inconsistent behavior between HTTP and gRPC workers. I've also provided a couple of suggestions to improve the code quality of the reverted code.