Neutron: Clean up documentation typo

Remove duplicate SERVICE_HOST and MYSQL_HOST settings in the
examples.

Change-Id: I0e102b671f03ccb183d30ec6a762d00ebcf1e4b5
diff --git a/doc/source/guides/neutron.rst b/doc/source/guides/neutron.rst
index 996c7d1..9dcb654 100644
--- a/doc/source/guides/neutron.rst
+++ b/doc/source/guides/neutron.rst
@@ -354,8 +354,6 @@
         HOST_IP=10.0.0.2
         SERVICE_HOST=10.0.0.2
         MYSQL_HOST=10.0.0.2
-        SERVICE_HOST=10.0.0.2
-        MYSQL_HOST=10.0.0.2
         RABBIT_HOST=10.0.0.2
         GLANCE_HOSTPORT=10.0.0.2:9292
         PUBLIC_INTERFACE=eth1
@@ -397,7 +395,7 @@
 allocated to you, so that you could access your instances from the
 public internet.
 
-The following is the DevStack configuration on 
+The following is the DevStack configuration on
 compute node 1.
 
 ::
@@ -405,8 +403,6 @@
         HOST_IP=10.0.0.3
         SERVICE_HOST=10.0.0.2
         MYSQL_HOST=10.0.0.2
-        SERVICE_HOST=10.0.0.2
-        MYSQL_HOST=10.0.0.2
         RABBIT_HOST=10.0.0.2
         GLANCE_HOSTPORT=10.0.0.2:9292
         ADMIN_PASSWORD=secrete