chore: cleanup unused import in cli module

PiperOrigin-RevId: 763233551

src/google/adk/cli/cli_tools_click.py

@@ -19,8 +19,6 @@ from datetime import datetime
 import logging
 import os
 import tempfile
-from typing import AsyncGenerator
-from typing import Coroutine
 from typing import Optional
 
 import click