### What this PR does / why we need it?
The file `offline_distributed_inference_npu.py` is the same as
`offline_inference_npu_tp2.py`, thus we delete one of them.
This PR is a part of
https://github.com/vllm-project/vllm-ascend/issues/1620.
### Does this PR introduce _any_ user-facing change?
### How was this patch tested?
- vLLM version: v0.9.2
- vLLM main:
8188196a1c
Signed-off-by: shen-shanshan <467638484@qq.com>