### What this PR does / why we need it? Fix doc for A2 series and cleanup note ### Does this PR introduce _any_ user-facing change? No ### How was this patch tested? CI passed - vLLM version: v0.11.0rc3 - vLLM main: https://github.com/vllm-project/vllm/commit/releases/v0.11.0 Signed-off-by: Yikun Jiang <yikunkero@gmail.com>