RFR: 8342679: Clean up PreviewFeature.Feature [v3]

[Chen Liang]

On Mon, 21 Oct 2024 14:49:34 GMT, Aggelos Biboudis <abimpoudis at openjdk.org> wrote:

>> After doing a build + bootcycle build confirms that these constants can be removed.
>
> Aggelos Biboudis has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update src/java.base/share/classes/jdk/internal/javac/PreviewFeature.java
>   
>   Co-authored-by: Chen Liang <liach at openjdk.org>

Thanks Aggelos, this change looks good.

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Marked as reviewed by liach (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/21605#pullrequestreview-2382376964