RFR(xxxs, trivial): 8203865: Metaspace cleanup: Remove unused MemRegion in VirtualSpaceNode

[Thomas Stüfe]

Hi all,

very tiny cleanup.

May I get a review (I consider this trivial):

Bug: https://bugs.openjdk.java.net/browse/JDK-8203865
Webrev: http://cr.openjdk.java.net/~stuefe/webrevs/8203865-Remove-unused-MemRegion-in-VirtualSpaceNode/webrev.00/webrev/

VirtualSpaceNode contains: MemRegion _reserved;

This member is not used and serves no purpose. It keeps track of the
reserved memory location, but that is redundant since the underlying
ReservedSpace does the same. It is also nowhere used. So it should be
removed.

Best Regards, Thomas