Get rid of obsolete Make variable TARGET_CORE_JARS.

Test: aosp_walleye-userdebug boots.

Bug: 147579140

Change-Id: Ibed8c8479b9c1f3ac333c66aeddea4f5f06c9aad
Merged-In: Ibed8c8479b9c1f3ac333c66aeddea4f5f06c9aad
(cherry picked from commit c46e0673d0568861a634456f72bac2de9805b990)
diff --git a/target/product/base_system.mk b/target/product/base_system.mk
index 77a5d53..5ff92ac 100644
--- a/target/product/base_system.mk
+++ b/target/product/base_system.mk
@@ -312,8 +312,8 @@
     tz_version_host \
     tz_version_host_tzdata_apex \
 
-ifeq ($(TARGET_CORE_JARS),)
-$(error TARGET_CORE_JARS is empty; cannot initialize PRODUCT_BOOT_JARS variable)
+ifeq ($(ART_APEX_JARS),)
+$(error ART_APEX_JARS is empty; cannot initialize PRODUCT_BOOT_JARS variable)
 endif
 
 # The order matters for runtime class lookup performance.
diff --git a/target/product/runtime_libart.mk b/target/product/runtime_libart.mk
index b59feaf..1fff8b0 100644
--- a/target/product/runtime_libart.mk
+++ b/target/product/runtime_libart.mk
@@ -16,10 +16,6 @@
 
 # Provides a functioning ART environment without Android frameworks
 
-ifeq ($(TARGET_CORE_JARS),)
-$(error TARGET_CORE_JARS is empty; cannot update PRODUCT_PACKAGES variable)
-endif
-
 # Additional mixins to the boot classpath.
 PRODUCT_PACKAGES += \
     android.test.base \
@@ -33,8 +29,7 @@
 
 # ART APEX module.
 # Note that this package includes the minimal boot classpath JARs (listed in
-# TARGET_CORE_JARS), which should no longer be added directly to
-# PRODUCT_PACKAGES.
+# ART_APEX_JARS), which should no longer be added directly to PRODUCT_PACKAGES.
 PRODUCT_PACKAGES += com.android.art
 PRODUCT_HOST_PACKAGES += com.android.art