RFR: 8245196: ZGC: No need to disable UseBiasedLocking by default

[Kim Barrett]

> On May 18, 2020, at 10:17 AM, Per Liden <per.liden at oracle.com> wrote:
> 
> By default, ZGC turns off UseBiasedLocking. With JEP 374 "Disable biased-locking and deprecate all flags related to biased-locking" now integrated, this is no longer necessary since it's off by default.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8245196
> Webrev: http://cr.openjdk.java.net/~pliden/8245196/webrev.0
> 
> /Per

Looks good.