RFR: 8371643: Remove ThreadLocalAllocBuffer::_reserve_for_allocation_prefetch [v2]

[Vladimir Kozlov]

On Tue, 11 Nov 2025 17:50:43 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Trivial removing obsoleted code for unsupported arch.
>> 
>> Test: tier1
>
> Albert Mingkun Yang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   review

I ran our testing (tier1-5) and there are no new failures. So I approve this change.
But you need second review. Preferable from other platforms supporters (RISC-V, PPC64, s390)

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Marked as reviewed by kvn (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/28240#pullrequestreview-3454014494