RFR: 8263861: Shenandoah: Remove unused member in ShenandoahGCStateResetter

[Aleksey Shipilev]

On Fri, 19 Mar 2021 13:57:55 GMT, Zhengyu Gu <zgu at openjdk.org> wrote:

> Please review this trivial patch that removed unused member of ShenandoahGCStateResetter.
> 
> Test:
> - [x] hotspot_gc_shenandoah with -XX:+ShenandoahVerify

Looks fine to me.

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Marked as reviewed by shade (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/3088