make_ext4fs has moved to build/target/core.mk

There's no need to add make_ext4fs to each device since it's in
build/target/core.mk since commit
720479ea7e6307648c56f61d82ac12d65f218dda

Bug: 6960586
Change-Id: I916b06e9d696764d1944d3c911ab75f4ef34fb7d
diff --git a/device.mk b/device.mk
index 113d97a..2c4c3e4 100644
--- a/device.mk
+++ b/device.mk
@@ -191,7 +191,6 @@
 
 # Filesystem management tools
 PRODUCT_PACKAGES += \
-	make_ext4fs \
 	e2fsck \
 	setup_fs