[Chore] Clean up pytorch helper functions in vllm.utils (#26908)

Signed-off-by: Isotr0py <mozf@mail2.sysu.edu.cn>
Signed-off-by: isotr0py <2037008807@qq.com>

tests/distributed/test_utils.py

@@ -11,10 +11,10 @@ import vllm.envs as envs
 from vllm.distributed.device_communicators.pynccl import PyNcclCommunicator
 from vllm.distributed.utils import StatelessProcessGroup
 from vllm.utils import (
-    cuda_device_count_stateless,
     get_open_port,
     update_environment_variables,
 )
+from vllm.utils.torch_utils import cuda_device_count_stateless
 
 from ..utils import multi_gpu_test