RFR: 8275439: Remove PrintVtableStats

[Zhengyu Gu]

On Tue, 19 Oct 2021 21:54:20 GMT, David Holmes <dholmes 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

Thanks, @dholmes-ora

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