RFR: Remove cleaning of ResolvedMethodTable from Safepoint cleaning tasks

[Aleksey Shipilev]

On 08/23/2018 04:47 PM, Zhengyu Gu wrote:
> Upstream JDK-8206423 (which already arrived to Shenandoah jdk) moved cleaning of ResolvedMethodTable
> to concurrent phase with lock.
> 
> We need to remove corresponding cleaning task from Safepoint cleaning tasks, or risk of deadlock.
> Webrev: http://cr.openjdk.java.net/~zgu/shenandoah/cleaning_rmt/webrev.00/

Looks good.

-Aleksey