[OP]Remove extra H2D in DeepGemm.

[K11OntheBoat]

Motivation

从Profile结果发现DeepGemm的GroupGemm在每次执行之前，都有一次非预期的H2D， 影响性能.

Modifications

删除 group gemm内的m__ = m_indices.numel()操作可消除.

Usage or Command

无.

Accuracy Tests

相比修改之前，修改后，BS=1的情况下, Qwen3-235B-FP8模型在Decode阶段的MOE计算耗时提升1.11倍，整体计算耗时追平SGLang.

Checklist

• Add at least a tag in the PR title.
  • Tag list: [[FDConfig],[APIServer],[Engine], [Scheduler], [PD Disaggregation], [Executor], [Graph Optimization], [Speculative Decoding], [RL], [Models], [Quantization], [Loader], [OP], [KVCache], [DataProcessor], [BugFix], [Docs], [CI], [Optimization], [Feature], [Benchmark], [Others], [XPU], [HPU], [GCU], [DCU], [Iluvatar], [Metax]]
  • You can add new tags based on the PR content, but the semantics must be clear.
• Format your code, run pre-commit before commit.
• Add unit tests. Please write the reason in this PR if no unit tests.
• Provide accuracy results.
• If the current PR is submitting to the release branch, make sure the PR has been submitted to the develop branch, then cherry-pick it to the release branch with the [Cherry-Pick] PR tag.

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
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Additional details and impacted files

@@            Coverage Diff             @@
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  Coverage           ?   61.28%           
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  Files              ?      317           
  Lines              ?    38812           
  Branches           ?     5849           
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  Hits               ?    23787           
  Misses             ?    13161           
  Partials           ?     1864           

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