RFR(T) 8226957: Shenandoah: Remove obsoleted "ShenandoahStoreCheck" option

[Aleksey Shipilev]

On 6/28/19 11:13 PM, Zhengyu Gu wrote:
> The option is obsoleted.
> 
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8226957
> Webrev: http://cr.openjdk.java.net/~zgu/JDK-8226957/webrev.00/

All right, fine. It was used before for the cooperative checks in the generated code, that was
removed long time ago. After that, we used to keep this flag to implement the aliased-heap verifier
on top of it, but it does not seem to happen any time soon. So the flag can go.

-- 
Thanks,
-Aleksey