tests: Remove HwsimSkip from p2p_channel

With the optimizations from the previous commits, none of the test cases
here need to be skipped.

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

tests/hwsim/test_p2p_channel.py

@@ -12,7 +12,6 @@ import time
 
 import hostapd
 import hwsim_utils
-from utils import HwsimSkip
 from tshark import run_tshark
 from wpasupplicant import WpaSupplicant
 from hwsim import HWSimRadio