### What this PR does / why we need it? bugfix for mooncake, remove useless judgement. ### How was this patch tested? by ci - vLLM version: v0.11.0rc3 - vLLM main: https://github.com/vllm-project/vllm/commit/v0.11.0 Signed-off-by: zouyida2052 <zouyida2002@gmail.com>