[router][CI] Clean up imports and prints statements in sgl-router/py_test (#12024)

sgl-router/py_test/e2e_grpc/function_call/test_openai_function_calling.py

@@ -13,10 +13,7 @@ Run with:
 """
 
 import json
-
-# CHANGE: Import router launcher instead of server launcher
 import sys
-import time
 import unittest
 from pathlib import Path
 

sgl-router/py_test/e2e_grpc/function_call/test_tool_choice.py

@@ -8,8 +8,6 @@ Tests: required, auto, and specific function choices in both streaming and non-s
 """
 
 import json
-
-# CHANGE: Import router launcher instead of server launcher
 import sys
 import unittest
 from pathlib import Path