git: openjdk/jdk: 8263998: Remove mentions of mc region in comments

[Yumin Qi]

Changeset: 1afbab63
Author:    Yumin Qi <minqi at openjdk.org>
Date:      2021-04-29 17:30:50 +0000
URL:       https://git.openjdk.java.net/jdk/commit/1afbab6394621ebee0d75771a75d19c8c43563d7

8263998: Remove mentions of mc region in comments

Reviewed-by: ccheung

! src/hotspot/share/cds/archiveBuilder.cpp
! src/hotspot/share/cds/metaspaceShared.cpp
! src/hotspot/share/cds/metaspaceShared.hpp