hg: shenandoah/jdk9/hotspot: drop useless barriers

[rwestrel at redhat.com]

Changeset: 9f68c7aa3ceb
Author:    roland
Date:      2016-06-28 10:03 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk9/hotspot/rev/9f68c7aa3ceb

drop useless barriers

! src/share/vm/opto/callnode.cpp
! src/share/vm/opto/cfgnode.cpp
! src/share/vm/opto/macro.cpp
! src/share/vm/opto/memnode.cpp
! src/share/vm/opto/node.cpp
! src/share/vm/opto/node.hpp
! src/share/vm/opto/shenandoahSupport.cpp
! src/share/vm/opto/subnode.cpp