Fix typo in documentation

This patch just removes a duplicate 'the'.

Change-Id: I3393a51d55ba8ec1639c2548781f8972f0d5c9d0
diff --git a/doc/source/guides/neutron.rst b/doc/source/guides/neutron.rst
index b26fd1e..05f60ba 100644
--- a/doc/source/guides/neutron.rst
+++ b/doc/source/guides/neutron.rst
@@ -595,7 +595,7 @@
 
 For OVS, a similar configuration like described in the
 :ref:`OVS Provider Network <ovs-provider-network-controller>` section can be
-used. Just add the the following line to this local.conf, which also loads
+used. Just add the following line to this local.conf, which also loads
 the MacVTap mechanism driver:
 
 ::