RFR (11): Clean up unused shenandoah_wb_C leftovers

[Aleksey Shipilev]

On 5/23/19 2:07 PM, Roman Kennke wrote:
> This is a little cleanup in sh/jdk11. We have leftover use of
> shenandoah_wb_C stub. It is not used anymore. This change removes the
> relevant code and brings the affected code to state pre-LRB of jdk/jdk.
> This is preparatory work for LRB backport to jdk 11.
> 
> http://cr.openjdk.java.net/~rkennke/jdk11-cleanup-wb-C/webrev.00/

Looks good. Please push it after the 11.0.4+4 pickup is in, so we have some testing done.

-Aleksey