[Misc] Clean up more utils (#27567)

Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>

vllm/v1/utils.py

@@ -25,8 +25,8 @@ from torch.autograd.profiler import record_function
 import vllm.envs as envs
 from vllm.logger import init_logger
 from vllm.usage.usage_lib import UsageContext, is_usage_stats_enabled, usage_message
-from vllm.utils import kill_process_tree
 from vllm.utils.network_utils import get_open_port, get_open_zmq_ipc_path, get_tcp_uri
+from vllm.utils.system_utils import kill_process_tree
 
 if TYPE_CHECKING:
     import numpy as np