<AWT Dev> [10] Review Request: 8193012 Small cleanup of AWTEvent class

[Sergey Bylokhov]

Hello.
Please review small cleanup for jdk10.

Bug: https://bugs.openjdk.java.net/browse/JDK-8193012
Webrev can be found at: http://cr.openjdk.java.net/~serb/8193012/webrev.00

The fix for JDK-8129854[1] missed some fields in AWTEvent class which 
became unused.

[1] http://hg.openjdk.java.net/jdk9/jdk9/jdk/rev/dc69f25a52aa#l9.1

-- 
Best regards, Sergey.