remove util related code

tests/benchmarks/utils.py

@@ -4,11 +4,12 @@
 """Utilities for benchmark tests."""
 
 import os
+import socket
+from contextlib import closing
 import multiprocessing as multiprocessing
 from multiprocessing import Process
 
 from superbench.benchmarks import BenchmarkRegistry
-from superbench.common.utils import network
 
 
 def clean_simulated_ddp_distributed_env():
@@ -20,6 +21,18 @@ def clean_simulated_ddp_distributed_env():
     os.environ.pop('MASTER_PORT')
 
 
+def get_free_port():
+    """Get a free port in current system.
+
+    Return:
+        port (int): a free port in current system.
+    """
+    with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as s:
+        s.bind(('', 0))
+        s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+        return s.getsockname()[1]
+
+
 def setup_simulated_ddp_distributed_env(world_size, local_rank, port):
     """Function to setup the simulated DDP distributed envionment variables."""
     os.environ['WORLD_SIZE'] = str(world_size)