Code Review 7030256: Cleanup/Remove code supporting old Windows versions (98, NT, 2000, etc)

[Chris Hegarty]

Alan, Michael,

The subject line says it all! Nice to be able to remove this old code 
that is no longer necessary. Hopefully this will make maintenance a 
little easier going forward.

http://cr.openjdk.java.net/~chegar/7030256/webrev.00/webrev/

Mike Duigou noticed I pushed this webrev to cr.openjdk yesterday and has 
already given feedback. Thanks Mike.

-Chris.