[8u communication] - Removal of jdk8u60-hs and jdk8u60-dev forests

[Seán Coffey]

To help keep the mercurial server clean of old unnecessary development 
forests, I'd like to propose that the jdk8u/hs-dev forest be deleted.

This is the old hotspot team integration forest that was used in the 
earlier days of the JDK 8 Updates Project. It's no longer used and all 
its changes are in the JDK 8u master forest (jdk8u).

If I hear no objections before COB Monday 1st February, I'll ask ops 
team to delete the forest.

-- 
Regards,
Sean.