RFR: 8367724: Remove Trailing Return Types from undecided list

[Stefan Karlsson]

On Tue, 16 Sep 2025 05:43:16 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

> Please review this trivial editorial change to the HotSpot Style Guide. This
> change removes Trailing Return Types from the undecided list. This should have
> been done as part of JDK-8366057, but was forgotten.

Marked as reviewed by stefank (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/27305#pullrequestreview-3227747286