RFR: 8351165: Remove unused includes from vmStructs [v3]

[Coleen Phillimore]

On Tue, 4 Mar 2025 14:30:49 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

> I think that if classes are being removed from here that the friendship with
VMStructs by those classes should also be removed.

Good point.  Thanks for remembering these.

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PR Comment: https://git.openjdk.org/jdk/pull/23897#issuecomment-2698293824