Drop python2 support.
Remove python3-markupsafe host build as python2 host builds for
markupsafe are not supported, python3 host builds are moved to
python-markupsafe.
Remove python3-jinja2 host build as python2 host builds for
jinja2 are not supported, python3 host builds are moved to
python-jinja2.
Remove python3-mako host build as python2 host builds for
mako are not supported, python3 host builds are moved to
python-mako.
Propagate reverse python3 dependency.
Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>