git: openjdk/jfx-sandbox: glass_gtk_bug_squashing: Remove test

[duke]

Changeset: 69e39c4a
Branch: glass_gtk_bug_squashing
Author:    Thiago Milczarek Sayao <thiago.sayao at gmail.com>
Date:      2025-04-21 12:22:22 +0000
URL:       https://git.openjdk.org/jfx-sandbox/commit/69e39c4a6ccdcf3fef33135682857d4371011822

Remove test

! modules/javafx.graphics/src/main/native-glass/gtk/glass_window.cpp
! tests/system/src/test/java/test/robot/javafx/stage/IconifyTest.java
- tests/system/src/test/java/test/robot/javafx/stage/StageOwnershipTest.java