[16] RFR: 8241065: Shenandoah: remove leftover code after JDK-8231086

[Zhengyu Gu]

Change looks good to me. Please update Copyright year.

Thanks,

-Zhengyu

On 8/12/20 3:40 PM, Charlie Gracie wrote:
> Hi,
> 
> Please review this change to remove the unused ArrayCopyStoreValMode enum.
> The Bug also mentions removing the write_ref_array_pre_work function but it was
> previously removed as part of JDK-8242130 [1].
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8241065
> Webrev: http://cr.openjdk.java.net/~burban/cgracie/JDK-8241065/webrev0.0/
> 
> Sponsor required: Yes
> 
> Test:
>     Built on MacOS {release,fastdebug}
> 
> Thanks,
> Charlie Gracie
> 
> [1] https://bugs.openjdk.java.net/browse/JDK-8242130
>