Explicitly mark unused parameters to resolve warnings

Reduce log spam during build.

Change-Id: Id0734c3a5bc08f728ca868a5a18375d8fc16bae6
diff --git a/Android.mk b/Android.mk
index b36cd35..9cd7ca9 100644
--- a/Android.mk
+++ b/Android.mk
@@ -1,7 +1,7 @@
 LOCAL_PATH := $(call my-dir)
 include $(CLEAR_VARS)
 LOCAL_MODULE := libjson
-LOCAL_CFLAGS := -Werror -Wno-error=unused-parameter
+LOCAL_CFLAGS := -Werror
 LOCAL_HEADER_LIBRARIES += qti_kernel_headers
 LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)
 LOCAL_SRC_FILES := arraylist.c \