Review request for 8028234: Remove unused methods in sun.misc.JavaAWTAccess

[Mandy Chung]

This is a simple code deletion in sun.misc.JavaAWTAccess and its 
implementation class:

Webrev:
http://cr.openjdk.java.net/~mchung/jdk8/webrevs/8028234/webrev.00/
This patch removes the methods from sun.misc.JavaAWTAccess that are no 
longer used.  The only dependency remaining from core-libs to AppContext 
is the ability to obtain an opaque unique object to represent an applet 
context ifit is running in an applet environment.

thanks
Mandy