RFR: JDK-8206272: Remove stray BarrierSetAssembler call

[Per Liden]

On 07/05/2018 05:12 PM, Roman Kennke wrote:
>   and while we are at trivial fixes, we've a call to get a
> BarrierSetAssembler* in methodHandles_x86.cpp that is subsequently not
> used anywhere.
> 
> Bug:
> https://bugs.openjdk.java.net/browse/JDK-8206272
> Webrev:
> http://cr.openjdk.java.net/~rkennke/JDK-8206272/webrev.00/
> 
> I assume this qualifies as trivial?

Yep, looks good and trivial to me.

/Per

> 
> Roman
>