hg: jdk/jdk: 8241065: Shenandoah: remove leftover code after JDK-8231086

[rkennke at redhat.com]

Changeset: 0246e1be4d35
Author:    rkennke
Date:      2020-08-14 18:23 +0200
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/0246e1be4d35

8241065: Shenandoah: remove leftover code after JDK-8231086
Reviewed-by: rkennke
Contributed-by: Charlie Gracie <charlie.gracie at microsoft.com>

! src/hotspot/share/gc/shenandoah/shenandoahBarrierSet.hpp