Revert "ART: Do not allow RETURN_VOID_NO_BARRIER outside constructors"

This reverts commit e93505f599682a2e95c4dac1c8633dec79c602bc.

This isn't the right thing to do, actually.

Bug: 22871329
Change-Id: I0a0a5a86c7c8d8afdf417444ca7d73e56e040515
1 file changed