audio_extn: Remove AIDL health usage pointless warning

Change-Id: I7f4b81e702b7a3b2e02edc3f9a28438a11610ff5
diff --git a/hal/audio_extn/Android.mk b/hal/audio_extn/Android.mk
index 75ecc37..88af7d0 100644
--- a/hal/audio_extn/Android.mk
+++ b/hal/audio_extn/Android.mk
@@ -99,7 +99,6 @@
 # Define HEALTH_AIDL for targets other than anorak.
 ifneq ($(TARGET_BOARD_PLATFORM), anorak)
     LOCAL_CFLAGS += -DHEALTH_AIDL
-    $(warning "Using AIDL HEALTH")
 endif
 
 LOCAL_SHARED_LIBRARIES := \