declutter the front page

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@5431 d4fa192b-c00b-0410-8231-f00ffab90ce4

doc/sphinx/index.rst

@@ -15,7 +15,7 @@ have Varnish up and running go through the :ref:`tutorial-index`.
 Contents:
 
 .. toctree::
-   :maxdepth: 2
+   :maxdepth: 1
 
    installation/index.rst
    tutorial/index.rst