RFR: Cleanup unused methods and statements

[Zhengyu Gu]

Good!

-Zhengyu

On 08/07/2017 12:11 PM, Aleksey Shipilev wrote:
> Another (trivial) round of cleanups:
>   http://cr.openjdk.java.net/~shade/shenandoah/cleanups-5/webrev.01/
>
> -Aleksey
>