Remove unneeded PRODUCT_RUNTIMES.

Bug: 18465297
Change-Id: I5463a2b8534d58083b3f8d1d79702de290e4aa44
diff --git a/mini_common.mk b/mini_common.mk
index 7609396..6e39a09 100644
--- a/mini_common.mk
+++ b/mini_common.mk
@@ -61,8 +61,6 @@
 # be included in platform.zip
 PRODUCT_PACKAGES += camera.goldfish.jpeg
 
-PRODUCT_RUNTIMES := runtime_libart_default
-
 PRODUCT_COPY_FILES += \
     frameworks/av/media/libeffects/data/audio_effects.conf:system/etc/audio_effects.conf \
     frameworks/native/data/etc/android.hardware.location.gps.xml:system/etc/permissions/android.hardware.location.gps.xml \
@@ -83,4 +81,3 @@
 $(call inherit-product-if-exists, frameworks/base/data/keyboards/keyboards.mk)
 $(call inherit-product-if-exists, frameworks/base/data/fonts/fonts.mk)
 $(call inherit-product-if-exists, frameworks/base/data/sounds/AudioPackage5.mk)
-