remove memtrack example

Bug: 190331117
Test: make sure ROM does not have the file
Change-Id: Iaec753ca0a1acbe1ecfb83d8cb65ede027a77d18
diff --git a/device.mk b/device.mk
index aa49851..9584896 100644
--- a/device.mk
+++ b/device.mk
@@ -463,10 +463,6 @@
 		gralloc.$(TARGET_BOARD_PLATFORM)
 endif
 
-# AIDL memtrack
-PRODUCT_PACKAGES += \
-	android.hardware.memtrack-service.example
-
 PRODUCT_PACKAGES += \
 	memtrack.$(TARGET_BOARD_PLATFORM) \
 	libion_exynos \