Revert "/bin/wifi: report association result for Quantenna."

This reverts commit e47ea10108fea5effb95439c4853ff6af3e10e5b because it
breaks 'make test'.

Change-Id: Ia580d4390cfa2b2a74e2fed43a26579640bb41f7
diff --git a/wifi/quantenna.py b/wifi/quantenna.py
index b88ccac..10af967 100755
--- a/wifi/quantenna.py
+++ b/wifi/quantenna.py
@@ -99,13 +99,6 @@
     # 'apply_security_config' must be called instead.
     _qcsapi('apply_security_config', 'wifi0')
 
-    for _ in xrange(10):
-      if _qcsapi('get_status', 'wifi0') == 'Up':
-        break
-      time.sleep(1)
-    else:
-      raise utils.BinWifiException('wpa_supplicant failed to connect')
-
   return True