[master] RFR: Remove a couple LIGHTWEIGHT things from the legacy/monitor version of FastHashCode

[Coleen Phillimore]

On Sat, 25 May 2024 00:30:23 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

> This branches off for lightweight mode, but there were a couple of lightweight cases left over.
> Tested locally hotspot:tier1 with default and with -XX:LockingMode=1.

I kind of went a different way but I like this refactoring.  Moving knowledge of monitor into ObjectMonitor seems like the right thing to do.

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PR Comment: https://git.openjdk.org/lilliput/pull/179#issuecomment-2137960317