RFR: 8371643: Remove ThreadLocalAllocBuffer::_reserve_for_allocation_prefetch

[Vladimir Kozlov]

On Tue, 11 Nov 2025 15:42:21 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Trivial removing obsoleted code for unsupported arch.
> 
> Test: tier1

You missed code in HS agent: `src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/VM.java`

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PR Review: https://git.openjdk.org/jdk/pull/28240#pullrequestreview-3448887549