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

sgl-router/py_test/integration/conftest.py

@@ -1,8 +1,7 @@
-import os
 import subprocess
 import time
 from pathlib import Path
-from typing import Dict, Iterable, List, Optional, Tuple
+from typing import Iterable, List, Optional, Tuple
 
 import pytest
 import requests

sgl-router/py_test/integration/load_balancing/test_power_of_two.py

@@ -17,6 +17,7 @@ def test_power_of_two_prefers_less_loaded(mock_workers, router_manager):
     urls = urls_slow + urls_fast
     ids = ids_slow + ids_fast
     slow_id = ids_slow[0]
+    slow_url = urls_slow[0]
 
     rh = router_manager.start_router(
         worker_urls=urls,

sgl-router/py_test/integration/load_balancing/test_random.py

@@ -1,5 +1,4 @@
 import collections
-import math
 
 import pytest
 import requests

sgl-router/py_test/integration/load_balancing/test_round_robin.py

@@ -1,5 +1,4 @@
 import collections
-import time
 
 import pytest
 import requests

sgl-router/py_test/integration/test_fault_tolerance.py

@@ -1,7 +1,3 @@
-import concurrent.futures
-import subprocess
-import time
-
 import pytest
 import requests
 

sgl-router/py_test/integration/test_pd_routing.py

@@ -1,6 +1,5 @@
 import collections
 import concurrent.futures
-import subprocess
 import time
 
 import pytest

sgl-router/py_test/integration/test_rate_limiting.py

@@ -1,5 +1,4 @@
 import concurrent.futures
-import time
 
 import pytest
 import requests

sgl-router/py_test/integration/test_retries.py

@@ -1,7 +1,3 @@
-import concurrent.futures
-import subprocess
-import time
-
 import pytest
 import requests
 

sgl-router/py_test/integration/test_worker_management.py

@@ -1,7 +1,3 @@
-import collections
-import subprocess
-import time
-
 import pytest
 import requests