RFR: Clean up dead code

[Roman Kennke]

Am 19.09.2018 um 11:28 schrieb Aleksey Shipilev:
> On 09/19/2018 11:18 AM, Roman Kennke wrote:
>> one more unused method I recently found is compile_prepare_oop() plus
>> the associated source files shenandoahBarrierSet_XXX.cpp Wanna rm those too?
> 
> Right. I haven't realized it is unused too. Purged the files too:
>   http://cr.openjdk.java.net/~shade/shenandoah/cleanups-9/webrev.02/
> 
> -Aleksey
> 

Perfect!
Thanks,
Roman