RFR: 8252245: Remove ScanClosure

[Per Liden]

Looks good.

/Per

On 8/25/20 9:13 AM, Stefan Karlsson wrote:
> Hi all,
> 
> Please review this patch to remove the unused ScanClosure class.
> 
> https://cr.openjdk.java.net/~stefank/8252245/webrev.01/
> https://bugs.openjdk.java.net/browse/JDK-8252245
> 
> Thanks,
> StefanK