RFR: 8304824: NMT should not use ThreadCritical [v9]

Mon Nov 4 07:56:38 UTC 2024

On Fri, 1 Nov 2024 21:56:36 GMT, Markus Grönlund <mgronlun at openjdk.org> wrote:

>This include is not needed because there are no uses that require the definition of Thread.

Right, seems like the forward declaration used to be provided by `memory/allocation.hpp`. Let's get rid of the include and use a forward declaration of our own instead.

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PR Review Comment: https://git.openjdk.org/jdk/pull/20852#discussion_r1827311285