Cleanup Newton Release Notes

Do not show versions 13.0.0 in the Newton release notes - see
http://docs.openstack.org/releasenotes/nova/newton.html

This adds the earliest-version directive to only show the Newton release
which was 14.0.0.

Also, do not generate an index file, it is empty, see:
http://docs.openstack.org/releasenotes/nova/genindex.html

Change-Id: Id24268bf4ecef1427ea727654bb07c7e8a848d59

releasenotes/source/conf.py

@@ -154,7 +154,7 @@ html_static_path = ['_static']
 #html_domain_indices = True
 
 # If false, no index is generated.
-#html_use_index = True
+html_use_index = False
 
 # If true, the index is split into individual pages for each letter.
 #html_split_index = False

releasenotes/source/index.rst

@@ -5,15 +5,9 @@ Contents
 ========
 
 .. toctree::
-   :maxdepth: 2
+   :maxdepth: 1
 
    unreleased
    newton
    mitaka
    liberty
-
-Indices and tables
-==================
-
-* :ref:`genindex`
-* :ref:`search`

releasenotes/source/newton.rst

@@ -4,3 +4,4 @@
 
 .. release-notes::
    :branch: origin/stable/newton
+   :earliest-version: 14.0.0