Remove the deprecated "giturl" option
Remove the deprecated "giturl" option

From openstackdocstheme 1.18.0, valid Git URLs can be retrieved by
openstackdocstheme[1], we do not need giturl option anymore.

[1] https://review.openstack.org/532163

Change-Id: I805d613429970d38d73396cbe5cdb462be4f9bfc

openstack/freezer-api,szaher/freezer-api,openstack/freezer-api,openstack/freezer-api,openstack/freezer-api,szaher/freezer-api,szaher/freezer-api,szaher/freezer-api