These do not render correctly when generating man pages and likely exist
from a time when the pages were built with rst2man (i.e. docutils)
instead of Sphinx. They're not necessary when using Sphinx since that
information is provided via the 'man_pages' config option in 'conf.py',
which are updated here to reflect reality.
Change-Id: I133e7231112cc9025e57a29d43bfa7002ca775e7
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>