RFR: 8315869: UseHeavyMonitors not used [v2]

[Alan Bateman]

On Wed, 20 Sep 2023 18:00:40 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> Please review this trivial change to remove the UseHeavyMonitors develop option, in favor of the now non-experimental LockingMode=LM_MONITOR (0) option.  Tested with tier1 locally.
>
> Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update option comment.

Marked as reviewed by alanb (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/15845#pullrequestreview-1636307098