RFR: 8365632: Remove unused local variable in GlassWindow

[Kevin Rushforth]

On Sat, 16 Aug 2025 07:04:11 GMT, Michael Strauß <mstrauss at openjdk.org> wrote:

> `originalSize` in GlassWindow::HandleNCCalcSizeEvent is not used and can be removed.

LGTM

A single reviewer will suffice.

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Marked as reviewed by kcr (Lead).

PR Review: https://git.openjdk.org/jfx/pull/1872#pullrequestreview-3129806281