docs: fix 404 for ironic docs

The Ironic documentation currently seems to be giving 404s at the
moment since the URLs contain /latest/ and the ironic-doc line seems
to add them automatically, ending up with /latest/latest/

This can be observed at the moment[0] but will likely not be visible
breakage once this change merges.

[0]: https://docs.openstack.org/nova/latest/admin/configuration/hypervisor-ironic.html

Change-Id: I89f74af4b4dda6b926e348e257273ed107af43a4

Author: mnaser

doc/source/admin/configuration/hypervisor-ironic.rst

@@ -18,23 +18,23 @@ relationship of ``instance:compute node:ironic node`` is 1:1:1.
 Scheduling of bare metal nodes is based on custom resource classes, specified
 via the ``resource_class`` property on a node and a corresponding resource
 property on a flavor (see the :ironic-doc:`flavor documentation
-</install/configure-nova-flavors.html>`).
+<install/configure-nova-flavors.html>`).
 The RAM and CPU settings on a flavor are ignored, and the disk is only used to
 determine the root partition size when a partition image is used (see the
 :ironic-doc:`image documentation
-</latest/install/configure-glance-images.html>`).
+<install/configure-glance-images.html>`).
 
 
 Configuration
 -------------
 
 - :ironic-doc:`Configure the Compute service to use the Bare Metal service
-  </latest/install/configure-compute.html>`.
+  <install/configure-compute.html>`.
 
 - :ironic-doc:`Create flavors for use with the Bare Metal service
-  </latest/install/configure-nova-flavors.html>`.
+  <install/configure-nova-flavors.html>`.
 
-- :ironic-doc:`Conductors Groups </admin/conductor-groups.html>`.
+- :ironic-doc:`Conductors Groups <admin/conductor-groups.html>`.
 
 
 Scaling and performance issues