RFR: 8295012: Arena should not derive from CHeapObj<mtNone>

[Kim Barrett]

On Mon, 10 Oct 2022 08:52:51 GMT, Stefan Karlsson <stefank at openjdk.org> wrote:

> What's the reason for keeping the new/delete operators in Arena, instead of inheriting from the newly introduced CHeapObjBase class?

No good reason.  I just forgot about them.  I will make that change.

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PR: https://git.openjdk.org/jdk/pull/10621