RFR: 8274927: Remove unnecessary G1ArchiveAllocator code

[Kim Barrett]

On Fri, 8 Oct 2021 07:14:08 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

> Hi all,
> 
>   can I have reviews for this change that removes code that is fairly trivially recognizable as useless?
> 
> The `_archive_allocator` is always freed after use (see `HeapShared::copy_closed/open_objects`), so it must always be `nullptr` when it's accessed outside the CDS dump code.
> I kept the asserts in the original places, but idk if that is really necessary.
> 
> Testing: tier1-5

Looks good.

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Marked as reviewed by kbarrett (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/5861