[misc] remove uesless patch

[wangxiyuan]

the patch for spec decode config looks useless now. Let's remove it.

• vLLM version: v0.11.0
• vLLM main: vllm-project/vllm@2918c1b

[gemini-code-assist]

Code Review

This pull request removes a patch for SpeculativeConfig, which is described as no longer being useful. This is a good cleanup, as it simplifies the codebase by removing a significant monkey patch, improving maintainability. The changes are straightforward and look correct based on the assumption that the patch is indeed obsolete.

A couple of minor points:

• There's a typo in the pull request title ('uesless' should be 'useless').
• For future reference, it would be beneficial to provide more context in the PR description explaining why a change is being made. For instance, explaining why this patch is no longer needed (e.g., 'This functionality is now included in vLLM version X.Y') would be very helpful for other developers understanding the evolution of the codebase.

[github-actions]

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[github-actions]

This pull request has conflicts, please resolve those before we can evaluate the pull request.

[github-actions]

This pull request has conflicts, please resolve those before we can evaluate the pull request.