Remove stale order-only dependency from build-art-*-tests targets.

TEST_ART_RUN_TEST_ORDERONLY_DEPENDENCIES isn't set anymore. It was
removed in https://r.android.com/370727.

#codehealth

Test: art/tools/buildbot-build.sh
Change-Id: I34bf11bb451010e330cfad092c7b7d867dd055d6
1 file changed