RFR: 8263821: Remove unused MethodTypeForm canonicalization codes

[Mandy Chung]

On Thu, 18 Mar 2021 15:42:49 GMT, Claes Redestad <redestad at openjdk.org> wrote:

> MethodTypeForm.INTS, LONGS and RAW_RETURN are effectively unused. This removes these canonicalization codes and cleans up related code.

I don't object this dead code elimination.  I don't know the design/thought when these unused canonicalization codes were defined.

-------------

Marked as reviewed by mchung (Reviewer).

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