hg: jdk9/hs-rt/hotspot: 8138833: Remove CMMarkStack::drain

[kim.barrett at oracle.com]

Changeset: f6da147987bb
Author:    kbarrett
Date:      2015-10-05 21:17 -0400
URL:       http://hg.openjdk.java.net/jdk9/hs-rt/hotspot/rev/f6da147987bb

8138833: Remove CMMarkStack::drain
Summary: Remove unused functions and data members.
Reviewed-by: pliden, brutisso

! src/share/vm/gc/g1/concurrentMark.cpp
! src/share/vm/gc/g1/concurrentMark.hpp