RFR: 8263821: Remove unused MethodTypeForm canonicalization codes

[Mandy Chung]

On Thu, 18 Mar 2021 22:56:53 GMT, Claes Redestad <redestad at openjdk.org> wrote:

>> I don't object this dead code elimination.  I don't know the design/thought when these unused canonicalization codes were defined.
>
> This code appear to have been initially introduced with the JDK 7 implementation of JSR 292, which implemented different ways of adapting to and from generic types than the current code: https://bugs.openjdk.java.net/browse/JDK-6839872
> 
> Many uses (possibly all) were removed in https://bugs.openjdk.java.net/browse/JDK-6983728 (8-b01) where adapters were reworked. This was backported to 7, so the code I'm removing here is probably dead in all active releases.

Thanks for the history.

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PR: https://git.openjdk.java.net/jdk/pull/3075