RFR: 8329471: Remove GTK2

Mon Jul 29 15:01:21 UTC 2024

GTK2 support for Swing/AWT was deprecated for removal in JDK 21. 

It's being removed because no platform that supports the JDK needs it.

Manual and automated testing is green.

-------------

Commit messages:
 - 8329471: Remove GTK2

Changes: https://git.openjdk.org/jdk/pull/20378/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20378&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8329471
  Stats: 3235 lines in 14 files changed: 0 ins; 3227 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/20378.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20378/head:pull/20378

PR: https://git.openjdk.org/jdk/pull/20378