RFR: 8275439: Remove PrintVtableStats

[David Holmes]

On Tue, 19 Oct 2021 15:09:01 GMT, Zhengyu Gu <zgu at openjdk.org> wrote:

> PrintVtableStats has not been very useful and reported information may not be accurate neither. Please see the CR and comments in JDK-8275413 for details.
> 
> - PrintVtableStats is none product flag, so does not require a CSR to remove it.
> - The patch also removes Klass::array_klasses_do() and families, as PrintVtableStats is the last use.
> - InstanceKlass/ArrayKlass::array_klasses_do(void f(Klass* k, TRAPS), TRAPS) have no use, remove them as well.

Looks good.

Thanks,
David

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Marked as reviewed by dholmes (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/6017