RFR(12u): 8223144: Remove obsolete null-handling block in ShenandoahBarrierNode::skip_through_barrier()

[Aleksey Shipilev]

On 4/30/19 3:26 PM, Roman Kennke wrote:
> Bug:
> https://bugs.openjdk.java.net/browse/JDK-8223144
> Webrev:
> http://cr.openjdk.java.net/~rkennke/JDK-8223144/webrev.00/
It looks okay to me. Roland might need to take a look.

-Aleksey