RFR: 8274282: Clarify special wait assert [v4]

[David Holmes]

On Mon, 4 Oct 2021 14:05:35 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> This change removes the assert and tests for Mutex::wait() only allowed with greater than nosafepoint ranked held locks.
>> Tested with tier1-3.
>
> Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update comment, maybe clearer?

LGTM :)

Thanks,
David

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Marked as reviewed by dholmes (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/5684