fixed flake8 lint errors

pyserve/ctl/_runner.py

@@ -7,16 +7,14 @@ Integrates with ProcessManager for actual process management.
 
 import asyncio
 import os
-import signal
 import sys
 import time
 from dataclasses import dataclass, field
-from pathlib import Path
-from typing import Any, Dict, List, Optional
+from typing import Dict, List, Optional
 
 from ..config import Config
-from ..process_manager import ProcessConfig, ProcessInfo, ProcessManager, ProcessState
-from .state import ServiceState, StateManager
+from ..process_manager import ProcessConfig, ProcessManager, ProcessState
+from .state import StateManager
 
 
 @dataclass