RFR(XS): ostream has unnecessary dependency on GCId

[Robbin Ehn]

Thanks, looks good.

/Robbin (not a Reviewer)

On 03/29/2016 04:09 AM, Kim Barrett wrote:
> Please review this small cleanup, eliminating a no longer
> needed #include dependency.
>
> CR:
> https://bugs.openjdk.java.net/browse/JDK-8152916
>
> Webrev:
> http://cr.openjdk.java.net/~kbarrett/8152916/webrev.00/
>
> Testing:
> JPRT
>