refactor: remove unused imports from model_runner_v1.py

Signed-off-by: Jade Zheng <zheng.shoujian@outlook.com>

Author: jianzs

vllm_ascend/worker/model_runner_v1.py

@@ -30,9 +30,7 @@
 import numpy.typing as npt
 import torch
 import torch._dynamo.cache_size
-import torch.distributed as dist
 import torch.nn as nn
-from torch.distributed import ReduceOp
 from vllm.attention import AttentionType, get_attn_backend
 from vllm.attention.layer import Attention
 from vllm.config import CompilationLevel, VllmConfig