RFR: 8277045: G1: Remove unnecessary set_concurrency call in G1ConcurrentMark::weak_refs_work

[Thomas Schatzl]

On Fri, 12 Nov 2021 12:23:00 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Simple change of removing an unnecessary method call.
> 
> Test: hotspot_gc

Lgtm.

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Marked as reviewed by tschatzl (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/6366