hg: shenandoah/jdk11: remove obsolete C2 changes

[rwestrel at redhat.com]

Changeset: e8a648ca321b
Author:    roland
Date:      2019-12-03 10:59 -0500
URL:       https://hg.openjdk.java.net/shenandoah/jdk11/rev/e8a648ca321b

remove obsolete C2 changes

! src/hotspot/share/opto/arraycopynode.cpp
! src/hotspot/share/opto/arraycopynode.hpp
! src/hotspot/share/opto/cfgnode.cpp
! src/hotspot/share/opto/compile.cpp
! src/hotspot/share/opto/library_call.cpp
! src/hotspot/share/opto/loopnode.cpp
! src/hotspot/share/opto/macro.hpp
! src/hotspot/share/opto/memnode.cpp
! src/hotspot/share/opto/parseHelper.cpp
! src/hotspot/share/opto/superword.cpp