RFR: 8344151: GenShen: Improve comments, clean up unnecessary and unintended changes

[Aleksey Shipilev]

On Wed, 13 Nov 2024 23:31:56 GMT, William Kemper <wkemper at openjdk.org> wrote:

> Address a few style nits from: https://github.com/openjdk/jdk/pull/21273

Marked as reviewed by shade (Committer).

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PR Review: https://git.openjdk.org/shenandoah/pull/536#pullrequestreview-2436280559