RFR: 8205678: ZGC: Remove unused ZAllocationFlags::java_thread()

[Stefan Karlsson]

Looks good, but maybe update this comment:
  //  * 7-5 Unused (3-bits)

StefanK

On 2018-06-26 12:45, Per Liden wrote:
> After JDK-8205676, the java_thread field in the ZAllocationFlags is 
> unused and can be removed.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8205678
> Webrev: http://cr.openjdk.java.net/~pliden/8205678/webrev.0
> 
> /Per