Classes in sunw.* should be removed from workspace and rt.jar

The two classes in sunw.util: EventObject and EventListener and one class in sunw.io: Serializable should be removed from the workspace and rt.jar.

These classes were originally meant to support Beans that were developed on 1.0.2 work with 1.1.

Removing these classes would also require removing:

make/sunw/Makefile
make/minclude/sunw.jmk