RFR: 8270059: Remove KVHashtable

[Ioi Lam]

On Thu, 8 Jul 2021 06:53:33 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> There are now only 2 uses of KVHashtable in the HotSpot code. They can be easily rewritten to use ResourceHashtable and ResizeableResourceHashtable.
>
> Thanks for clarifying.

Thanks @dholmes-ora and @coleenp for the review.

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PR: https://git.openjdk.java.net/jdk/pull/4715