RFR: JDK-8227199: Shenandoah: Remove superfluous calls to can_do_traversal_gc()

[Aleksey Shipilev]

On 7/3/19 5:35 PM, Roman Kennke wrote:
>  We've got a few calls to can_do_traversal_gc() in assembler which are
> superfluous because ShenandoahSATBBarrier is already checked and covers
> the traversal case. Let's remove them.
> 
> Bug:
> https://bugs.openjdk.java.net/browse/JDK-8227199
> Webrev:
> http://cr.openjdk.java.net/~rkennke/JDK-8227199/webrev.00/
OK. Thanks!

-Aleksey