Clean up cc_test/art_cc_test TEST_MAPPING after default update

After b/179092189, cc_test host_supported:true doesn't need TEST_MAPPING config anymore to
run in presubmit.

Change-Id: I40c912565dbaf598dbc51522ec2c784a54b0c60d
Test: presubmit
Bug: 178646865
1 file changed