hg: shenandoah/jdk10: Retract superfluous changes against upstream

[ashipile at redhat.com]

Changeset: 854bf673f515
Author:    shade
Date:      2018-02-15 12:00 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk10/rev/854bf673f515

Retract superfluous changes against upstream

! src/hotspot/share/classfile/dictionary.cpp
! src/hotspot/share/gc/g1/g1StringDedupQueue.cpp
! src/hotspot/share/gc/g1/g1StringDedupQueue.hpp
! src/hotspot/share/gc/g1/g1StringDedupTable.cpp
! src/hotspot/share/gc/g1/g1StringDedupThread.cpp
! src/hotspot/share/opto/lcm.cpp