Fix verifier crash on abstract final class.

Remove a check for erroneous class. It should not matter to
the verifier whether the class is just resolved, initialized
or resolved erroneous. The check was also inherently racy
and could yield different behavior based on the timing of
the verification.

Test: 161-final-abstract-class
Test: testrunner.py --host
Bug: 37248840
Change-Id: Ic4d964050bbe52e3de4438ada9e75676956cb6b4