Updated openstack/openstack
Project: openstack/python-keystoneclient  8d94c6540a3c8adf31c0bede59d11e0dbc979e2e
null
Remove reference to non-existent shell doc

There's no "shell.rst" document, so the index shouldn't reference
it.

Change-Id: I0d02b32349cfb6592b432700b4e04fda7fecbba8