RFR: 8237882: ZGC: Removed ZUtils::round_{up, down}_power_of_2() declarations

[Stuart Monteith]

This looks OK (not a reviewer).

On Mon, 27 Jan 2020 at 13:57, Per Liden <per.liden at oracle.com> wrote:
>
> JDK-8234331 removed ZUtils::round_{up,down}_power_of_2() but left the
> function declarations in the ZUtils class.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8237882
> Webrev: http://cr.openjdk.java.net/~pliden/8237882/webrev.0
>
> /Per