RFR(xs): JDK-6787054 - Par compact - remove code that clears source_region

[Thomas Schatzl]

Hi,

On Mon, 2016-02-29 at 14:51 +0100, Jesper Wilhelmsson wrote:
> Hi,
> 
> Minor cleanup in ParallelScavenge - remove unused
> clear_source_region().
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-6787054
> Webrev: http://cr.openjdk.java.net/~jwilhelm/6787054/webrev.00/

  looks good.

Thomas