Automotive: removed TARGET_USES_AOSP_FOR_AUDIO flag from steppe_au

Change-Id: Ie6c72f5f15081e7e519899a409e6ffa1fca0319b
diff --git a/configs/msmsteppe_au/msmsteppe_au.mk b/configs/msmsteppe_au/msmsteppe_au.mk
index ecb4908..a28c19d 100644
--- a/configs/msmsteppe_au/msmsteppe_au.mk
+++ b/configs/msmsteppe_au/msmsteppe_au.mk
@@ -2,7 +2,6 @@
 #
 #AUDIO_FEATURE_FLAGS
 BOARD_USES_ALSA_AUDIO := true
-TARGET_USES_AOSP_FOR_AUDIO := false
 
 ifneq ($(TARGET_USES_AOSP_FOR_AUDIO), true)
 USE_CUSTOM_AUDIO_POLICY := 1