Remove hardcoded TARGET_PREFER_32_BIT_APPS.

This isn't required any longer, besides individual products
should be allowed to set this value themselves.

(cherry picked from commit 7b9347a7f9d870e149ef38438ad547abe2709ee2)

Change-Id: If459eab32c6e7831596224ad3503baefbf028133
diff --git a/CleanSpec.mk b/CleanSpec.mk
index 17fd5d6..7108e10 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -220,6 +220,9 @@
 # Adding dalvik.vm.dex2oat-flags to eng builds
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
 
+# Unset TARGET_PREFER_32_BIT_APPS for 64 bit targets.
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/build.prop)
+
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************
diff --git a/target/product/core_64_bit.mk b/target/product/core_64_bit.mk
index 5d7abcb..971b6bd 100644
--- a/target/product/core_64_bit.mk
+++ b/target/product/core_64_bit.mk
@@ -29,11 +29,5 @@
 # This line must be parsed before the one in core_minimal.mk
 PRODUCT_DEFAULT_PROPERTY_OVERRIDES += ro.zygote=zygote32_64
 
-# Temporary hack to prefer launching processes as 32 bit
-# instead of 64 bit.
-#
-# STOPSHIP: Revert this to allow products to select it themselves
-TARGET_PREFER_32_BIT_APPS := true
-
 TARGET_SUPPORTS_32_BIT_APPS := true
 TARGET_SUPPORTS_64_BIT_APPS := true