RFR (XXS): 8232260: Remove g1 prefix in G1CollectedHeap::g1_hot_card_cache() getter

[Kim Barrett]

> On Oct 15, 2019, at 9:13 AM, Thomas Schatzl <thomas.schatzl at oracle.com> wrote:
> 
> Hi,
> 
>  can I have reviews for this small cleanup that removes some "g1_" prefix from some getter and some related unnecessary friend declaration.
> 
> 
> CR:
> https://bugs.openjdk.java.net/browse/JDK-8232260
> Webrev:
> http://cr.openjdk.java.net/~tschatzl/8232260/webrev/
> Testing:
> local compilation
> 
> Thanks,
>  Thomas

Looks good.