RFR: 8286298: Remove unused methods in sun.invoke.util.VerifyType [v2]

[Mandy Chung]

On Mon, 9 May 2022 10:12:36 GMT, Claes Redestad <redestad at openjdk.org> wrote:

>> A few untested and unused methods in `VerifyType` which can be removed. (Possibly used by native JSR 292 implementations in JDK 7).
>
> Claes Redestad has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Inline isNullReferenceConversion at sole call site and remove it as well

Marked as reviewed by mchung (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/8570