Remove version-added on name field.

This parameter was actually added in 2.0.  It's just that the
documentation in previous versions of the module were wrong (it said the
name was  "network" rather than "name.)  I've renamed the parameter in
the documentation of prior versions so ansible-module-validate should no
longer think that this is a new parameter.

lib/ansible/modules/cloud/openstack/os_networks_facts.py

@@ -37,7 +37,6 @@ options:
      description:
         - Name or ID of the Network
      required: false
-     version_added: "2.2"
    filters:
      description:
         - A dictionary of meta data to use for further filtering.  Elements of