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

sgl-router/py_test/e2e_grpc/validation/test_large_max_new_tokens.py

@@ -3,8 +3,6 @@ python3 -m unittest openai_server.validation.test_large_max_new_tokens.TestLarge
 """
 
 import os
-
-# CHANGE: Import router launcher instead of server launcher
 import sys
 import time
 import unittest
@@ -104,7 +102,6 @@ class TestLargeMaxNewTokens(CustomTestCase):
                 self.stderr.flush()
                 lines = open(STDERR_FILENAME).readlines()
                 for line in lines[pt:]:
-                    print(line, end="", flush=True)
                     if f"#running-req: {num_requests}" in line:
                         all_requests_running = True
                         pt = -1

sgl-router/py_test/e2e_grpc/validation/test_openai_server_ignore_eos.py

@@ -12,7 +12,6 @@ Run with:
     pytest py_test/e2e_grpc/e2e_grpc/validation/test_openai_server_ignore_eos.py -v
 """
 
-# CHANGE: Import router launcher instead of server launcher
 import sys
 from pathlib import Path