Really enable jemalloc.

This change was made before and wiped out by a merge coming from some
other branch.

Change-Id: Iaa52f1b102876a69869e586747894d47ab8a88cd
diff --git a/BoardConfig.mk b/BoardConfig.mk
index 2c99425..97629d5 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -24,7 +24,5 @@
 
 TARGET_RECOVERY_FSTAB = device/asus/deb/fstab.deb
 
-MALLOC_IMPL := dlmalloc
-
 -include vendor/asus/deb/BoardConfigVendor.mk
 include device/asus/flo/BoardConfigCommon.mk