Adjust User Guide redirects
Adjust User Guide redirects

Recent changes removed the extra enduser/adminuser directories and thus
we need to adjust URLs.

Also, remove old redirects for the User Guide that have been around
since over a year.

Since those directories were only used briefly, not adding redirects for
them.

Change-Id: Ic525e9e51ba28550055889628ddf8f66b515925b

AlekhyaMallina-Vedams/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,openstack/openstack-manuals,kairoaraujo/openstack-manuals,openstack/openstack-manuals,Akasurde/openstack-manuals,kairoaraujo/openstack-manuals,saeki-masaki/openstack-manuals,potsmaster/openstack-manuals,Akasurde/openstack-manuals,potsmaster/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,saeki-masaki/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals