RFR: 8323738: Serial: Remove unreachable methods in Generation [v2]

[Thomas Schatzl]

On Mon, 15 Jan 2024 17:33:33 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Trivial removing effectively dead code.
>
> Albert Mingkun Yang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   review

Marked as reviewed by tschatzl (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/17429#pullrequestreview-1822112156