RFR: 8338695: GenShen: Clean up jtreg tests

[Kelvin Nilsen]

On Mon, 16 Sep 2024 18:09:23 GMT, William Kemper <wkemper at openjdk.org> wrote:

> Inexplicable merge conflict in SupplementaryLocaleDataProvider.java. Took what was already in the 21 repo, we've never touched that file.

Marked as reviewed by kdnilsen (Committer).

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PR Review: https://git.openjdk.org/shenandoah-jdk21u/pull/93#pullrequestreview-2307394294