### What this PR does / why we need it? Since https://github.com/vllm-project/vllm-ascend/pull/3284 merged, should discard some extra code that was previously done for version compatibility ### Does this PR introduce _any_ user-facing change? ### How was this patch tested? - vLLM version: v0.11.0 Signed-off-by: wangli <wangli858794774@gmail.com>