RFR: 8306482: Remove unused Method AccessFlags

[David Holmes]

On Thu, 20 Apr 2023 00:35:06 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

> Please review this small change to remove Method AccessFlags that are unused.  These flags were moved to ConstMethod a long time ago.
> Tested with tier1-4, SA tests locally

Seems okay. Thanks.

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Marked as reviewed by dholmes (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/13549#pullrequestreview-1393100023