git: openjdk/jfx-sandbox: glass_gtk_bug_squashing: Revert unecessary changes

[duke]

Changeset: eca31fc8
Branch: glass_gtk_bug_squashing
Author:    Thiago Milczarek Sayao <thiago.sayao at gmail.com>
Date:      2025-04-21 18:53:36 +0000
URL:       https://git.openjdk.org/jfx-sandbox/commit/eca31fc82676735a887b97c7839b9677608e8dec

Revert unecessary changes

! modules/javafx.graphics/src/main/java/com/sun/glass/ui/gtk/GtkWindow.java
! modules/javafx.graphics/src/main/native-glass/gtk/glass_window.h
! tests/system/src/test/java/test/util/Util.java