RFR: 8304055: G1: Remove OldGCAllocRegion::release

[Thomas Schatzl]

On Mon, 13 Mar 2023 13:58:28 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Simple removing unnecessary code around BOT update in old-gen allocator.
> 
> Test: tier1-6

Thanks for spotting this! Lgtm.

I added some additional history to the CR.

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Marked as reviewed by tschatzl (Reviewer).

PR: https://git.openjdk.org/jdk/pull/12999