Remove test that ACC_SUPER be present in Modifiers

The ACC_SUPER modifier has never been meaningful, required or
(generally) present in android. Furthermore it is no longer
meaningful in other major runtimes. We change the
ReferenceType.ModifiersTest#testModifiers001
test to remove an assertion that the ACC_SUPER flag is present.

Test: ./art/tools/run-libjdwp-tests.sh --mode=host
Test: ./art/tools/run-jdwp-tests.sh --mode=host

Bug: 66906055

Change-Id: I263be2b7386ebe66109998959d192b10255cea94