…to avoid unintentional copy ops blocking across different NPU streams, improving disagg TTIT/TTFT (#2788)" ### What this PR does / why we need it? This reverts commit6995a7bc5b. We'll add it back once the issue is fixed. related issue: https://github.com/vllm-project/vllm-ascend/issues/3195 ### How was this patch tested? - vLLM version: v0.10.2 - vLLM main:52d0cb8458