RFR: 8304804: Remove develop flag G1VerifyCTCleanup

[Thomas Schatzl]

On Thu, 23 Mar 2023 22:05:09 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Hi all,
>> 
>>   please review the removal of the develop `G1VerifyCTCleanup` option. This develop flag seems to be not worth keeping as regular verification (`VerifyAfterGC`) performs this one anyway, and if it's too heavyweight it is trivial to add again for debugging.
>> 
>> There also seems to be no particular reason compared to others why you would specifically need card table verification more than other.
>> 
>> Testing: local compilation, gha
>> 
>> Thanks,
>>   Thomas
>
> Marked as reviewed by ayang (Reviewer).

Thanks @albertnetymk @kimbarrett for your reviews

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PR Comment: https://git.openjdk.org/jdk/pull/13166#issuecomment-1484703860