RFR: 8264800: cleanup Threads_lock comments in JVM/TI function headers

[Robbin Ehn]

On Fri, 28 May 2021 19:40:00 GMT, Daniel D. Daugherty <dcubed at openjdk.org> wrote:

> A trivial fix to cleanup Threads_lock comments in JVM/TI function headers.
> 
> Also remove errant text added by the jframeID XSL template code:
> 
> 
> // java_thread - unchecked
> // depth - pre-checked as non-negative
> 
> 
> The first line about `jthread` is output in error.
> Only the second line about `depth` should be included.
> 
> This fix is tested with a Mach5 Tier1 job set.

Marked as reviewed by rehn (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/4254