remove <boost/noncopyable.hpp> in pch and
remove boost from makefile if it was the only boost entry.

Change-Id: Icb945ae59c137571f4f63807601738eea5c3e831
Reviewed-on: https://gerrit.libreoffice.org/24061Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Michael Stahl <mstahl@redhat.com>