<AWT Dev> [12] Review Request: 8210286 Drop of sun.awt.HToolkit class

Mon Sep 3 23:36:26 UTC 2018

Hello.
Please review the fix for jdk 12.

This class was used as a headless toolkit for embedded purposes.
  - It was added in the JDK-7030063
  - Its usage was removed in JDK-8140723 and JDK-8025673.

The usage of strings "sun.awt.HToolkit" and "javaplugin.version" in 
GraphicsEnvironment were also dropped, because both are never use.

Bug: https://bugs.openjdk.java.net/browse/JDK-8210286
Webrev: http://cr.openjdk.java.net/~serb/8210286/webrev.00

-- 
Best regards, Sergey.