Retire LOCAL_NDK_VERSION.

Bug: 6932421
Change-Id: I4007da47dcff1ab582598507c4a5f092c48bb1cd
diff --git a/Android.mk b/Android.mk
index 97a4845..6e72b23 100644
--- a/Android.mk
+++ b/Android.mk
@@ -44,7 +44,6 @@
 include $(CLEAR_VARS)
 
 ifeq ($(TARGET_ARCH),arm)
-    LOCAL_NDK_VERSION := 5
     LOCAL_SDK_VERSION := 9
 endif