RFR: 8260605: Various java.lang.invoke cleanups [v7]

[Mandy Chung]

On Wed, 17 Mar 2021 19:12:10 GMT, Claes Redestad <redestad at openjdk.org> wrote:

>> - Remove unused code
>> - Inline and simplify the bootstrap method invocation code (remove pointless reboxing checks etc)
>> - Apply pattern matching to make some code more readable
>
> Claes Redestad has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Rename className -> name, prefixedClassName -> className, makeImpl input validation commentary

Thanks for doing the renames.   Looks good.

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Marked as reviewed by mchung (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/2300