This is a follow-up to [JDK-8241840](https://bugs.openjdk.java.net/browse/JDK-8241840) that removes an unused static `focusedWindow` field and its associated getter and setter from the platform-independent glass Window class. This is entirely unused by any of the glass platforms. The Monocle platform keeps track of the `focusedWindow` attribute itself.
The existing `test.javafx.stage.FocusedWindowNativeTest` automated test, which was added as part of [JDK-8241840](https://bugs.openjdk.java.net/browse/JDK-8241840), was failing fairly consistently on one of our test machines before this fix, and now passes. ------------- Commit messages: - Remove unused focusedWindow field in glass Window to avoid leak Changes: https://git.openjdk.java.net/jfx/pull/286/files Webrev: https://webrevs.openjdk.java.net/jfx/286/webrev.00 Issue: https://bugs.openjdk.java.net/browse/JDK-8251555 Stats: 15 lines in 1 file changed: 0 ins; 15 del; 0 mod Patch: https://git.openjdk.java.net/jfx/pull/286.diff Fetch: git fetch https://git.openjdk.java.net/jfx pull/286/head:pull/286 PR: https://git.openjdk.java.net/jfx/pull/286
