RFR: 8261657: [PPC64] Cleanup StoreCM nodes after CMS removal

[Goetz Lindenmaier]

On Wed, 17 Feb 2021 13:07:19 GMT, Goetz Lindenmaier <goetz at openjdk.org> wrote:

>> We only need one StoreCM node after CMS removal. CMS StoreStore barriers were already removed at other places.
>
> Marked as reviewed by goetz (Reviewer).

LGTM

-------------

PR: https://git.openjdk.java.net/jdk/pull/2554