AudioPolicy: remove extraneous parentheses

Change-Id: Ibcea37b90cc0aaacb3b6194745bf569edad8992a
diff --git a/services/audiopolicy/enginedefault/src/Engine.cpp b/services/audiopolicy/enginedefault/src/Engine.cpp
index b4d7246..1fd3341 100755
--- a/services/audiopolicy/enginedefault/src/Engine.cpp
+++ b/services/audiopolicy/enginedefault/src/Engine.cpp
@@ -515,7 +515,7 @@
         if (device2 == AUDIO_DEVICE_NONE) {
             device2 = availableOutputDevicesType & AUDIO_DEVICE_OUT_WIRED_HEADPHONE;
         }
-        if ((device2 == AUDIO_DEVICE_NONE)) {
+        if (device2 == AUDIO_DEVICE_NONE) {
             device2 = availableOutputDevicesType & AUDIO_DEVICE_OUT_LINE;
         }
         if (device2 == AUDIO_DEVICE_NONE) {