RFR: 8357688: Remove unnecessary List.get before remove in PopupFactory

[Sergey Bylokhov]

On Sat, 17 May 2025 07:42:59 GMT, Andrey Turbanov <aturbanov at openjdk.org> wrote:

> Instead of separate List.get+List.remove calls we can use single `removeFirst`. It's clearer.

Marked as reviewed by serb (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/25283#pullrequestreview-2893804084