RFR: 8296224: G1: Remove unnecessary update in VM_G1CollectForAllocation

[Albert Mingkun Yang]

On Wed, 2 Nov 2022 15:16:29 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Simple change of removing an unnecessary assignment.
> 
> Test: hotspot_gc

Thanks for the review.

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PR: https://git.openjdk.org/jdk/pull/10949