RFR(XS): Remove unused ShenandoahPrinter

[Aleksey Shipilev]

On 08/01/2017 02:59 PM, Zhengyu Gu wrote:
> Removed no longer used ShenandoahPrinter
> 
> http://cr.openjdk.java.net/~zgu/shenandoah/rm_sh_printer/webrev.00/

Funny story about that: I had removed unused printing routines from ShenandoahHeap, but then
Christine wanted to keep them around for debugging purposes. Thus ShenandoahPrinter was born, where
these routines found their temporary home. And that kinda explains why it is unused. Talk to chf
about that ;)

Thanks,
-Aleksey