RFR: 8329368: Generational ZGC: Remove the unnecessary friend classes in ZAllocator [v2]

[Erik Österlund]

On Tue, 2 Apr 2024 10:16:22 GMT, Guoxiong Li <gli at openjdk.org> wrote:

>> Hi all,
>> 
>> This trivial patch removes the unnecessary friend classes in `ZAllocator`. The tests `make test-tier1_gc` passed locally.
>> 
>> Thanks for taking the time to review.
>> 
>> Best Regards,
>> -- Guoxiong
>
> Guoxiong Li has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Remove blank line.

Marked as reviewed by eosterlund (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/18560#pullrequestreview-1974116594