Delete dumplicate codes and fix a bug

[SunnyLee151064]

What this PR does / why we need it?

Delete dumplicate codes and fix a bug

Does this PR introduce any user-facing change?

No

How was this patch tested?

• vLLM version: v0.10.0
• vLLM main: vllm-project/vllm@67c153b

[gemini-code-assist]

Code Review

This pull request includes two changes: a bug fix and a code cleanup. The bug fix in vllm_ascend/quantization/quant_config.py adds a check to ensure the moe attribute exists on a FusedMoE layer before accessing it, preventing a potential AttributeError. The code cleanup in vllm_ascend/worker/model_runner_v1.py removes a redundant call to _check_dbo_is_valid. Both changes are correct and improve the robustness and clarity of the code.

[github-actions]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.74%. Comparing base (1a70564) to head (45b652f).
⚠️ Report is 45 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2341      +/-   ##
==========================================
- Coverage   76.35%   75.74%   -0.61%     
==========================================
  Files         117      118       +1     
  Lines       13371    13525     +154     
==========================================
+ Hits        10209    10245      +36     
- Misses       3162     3280     +118     

Flag	Coverage Δ
unittests	75.74% <100.00%> (-0.61%)	⬇️

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[github-actions]

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