RFR: 8299726: [cleanup] Some code cleanup in opto/compile.hpp

[Jie Fu]

On Fri, 6 Jan 2023 09:27:01 GMT, xpbob <duke at openjdk.org> wrote:

> Hi all,
> Int_Array,Scope,TypeData,debug_option_name  is unused
> Remove them
> Thanks.

There seems no declarations for `class Int_Array` `class Scope` and `class TypeData`, right?

Please also update the copyright year to 2023.
Thanks.

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PR: https://git.openjdk.org/jdk/pull/11879