<AWT Dev> Request for review: 8003898 X11 toolkit can be chosen as the default toolkit.

[Alexey Utkin]

Hi Everyone,
Please review the fix.

Bug description:
     https://jbs.oracle.com/bugs/browse/JDK-8003898

Here is the suggested fix:
     http://cr.openjdk.java.net/~uta/openjdk-webrevs/JDK-8003898/webrev.00/

The fix removes the line that is responsible for XToolkit selection and 
an obsolete function [isXDisplayDefined].

Regards,
-uta