RFR: 8341776: Remove unused enum values from LambdaForm$Kind

[Claes Redestad]

On Sat, 19 Oct 2024 20:39:48 GMT, Claes Redestad <redestad at openjdk.org> wrote:

> Trivially removing some unused left-over `LambdaForm$Kind` enums. 
> 
> - Last use of `COLLECT` and `SPREAD` was removed by fac39fe9
> - `FIELD` was added by 8d5f5b9a but had no usage from the start
> - Last use of `CONVERT` was removed by eda5f090

Thanks!

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PR Comment: https://git.openjdk.org/jdk/pull/21592#issuecomment-2429349036