Get rid of obsolete Make variable TARGET_CORE_JARS.

Test: aosp_walleye-userdebug boots.
Test: art/test/testrunner/testrunner.py --target --64
Test: art/tools/run-gtests.sh -j4
Test: art/test.py --host -r

Bug: 147579140

Change-Id: Iab4d4c7f875773c0141688dc681b9abb37010264
Merged-In: Iab4d4c7f875773c0141688dc681b9abb37010264
(cherry picked from commit d8cdd4e0949f3c79a4fc1f3c39368462b46f4b32)
4 files changed