RFR: 8297639: Remove preventive GCs in G1

[Thomas Schatzl]

On Tue, 13 Dec 2022 20:10:46 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Hi all,
>> 
>>   can I have reviews for this removal of preventive gcs for G1?
>> 
>> This feature seems to bring more harm than benefit, so after disabling it by default in JDK 20 (reasons described in [JDK-8293861](https://bugs.openjdk.org/browse/)), this change removes the feature altogether.
>> 
>> This is almost a backout of the original change.
>> 
>> Testing: tier1-5
>> 
>> Thanks,
>>   Thomas
>
> Marked as reviewed by ayang (Reviewer).

Thanks @albertnetymk @walulyai for your reviews

-------------

PR: https://git.openjdk.org/jdk/pull/11654