All neutron plugins should now use LibvirtGenericVIFDriver

Change-Id: I70015ae55fe6db9c6c4663a8d021fe9cfe2eddcf
diff --git a/lib/neutron_plugins/linuxbridge_agent b/lib/neutron_plugins/linuxbridge_agent
index 88c49c5..85e8c08 100644
--- a/lib/neutron_plugins/linuxbridge_agent
+++ b/lib/neutron_plugins/linuxbridge_agent
@@ -11,7 +11,7 @@
 }
 
 function neutron_plugin_create_nova_conf() {
-    NOVA_VIF_DRIVER=${NOVA_VIF_DRIVER:-"nova.virt.libvirt.vif.LibvirtGenericVIFDriver"}
+    :
 }
 
 function neutron_plugin_install_agent_packages() {