tests: Remove unused import statements

These were not used at all and caused unnecessary operations and in some
cases, compatibility issues with python3.

Signed-off-by: Jouni Malinen <j@w1.fi>

tests/hwsim/test_p2p_wifi_display.py

@@ -7,12 +7,8 @@
 from remotehost import remote_compatible
 import logging
 logger = logging.getLogger()
-import time
-import threading
-import Queue
 
 import hwsim_utils
-import utils
 from p2p_utils import *
 
 def test_wifi_display(dev):