fixed flake8 lint errors

pyserve/ctl/commands/down.py

@@ -5,7 +5,7 @@ pyserve down - Stop all services
 import signal
 import time
 from pathlib import Path
-from typing import Optional, cast
+from typing import cast
 
 import click
 
@@ -56,6 +56,7 @@ def down_cmd(
 
         try:
             import os
+
             # FIXME: Please fix the cast usage here
             os.kill(cast(int, daemon_pid), signal.SIGTERM)
 
@@ -93,8 +94,8 @@ def down_cmd(
 
         console.print("[bold]Stopping services...[/bold]")
 
-        from .._runner import ServiceRunner
         from ...config import Config
+        from .._runner import ServiceRunner
 
         config_path = Path(ctx.config_file)
         if config_path.exists():