Remove clean up of [DEFAULT] ovs_integration_bridge

This logic was added during Victoria cycle[1], and has been kept for
4 cycles. So we can safely assume the old parmaeter is removed during
upgrade.

[1] 802da636e95a44663c272834cb43e4a4faf3c42d

Change-Id: Iaadc6313d50d283dece737290604b2253578dd3d

manifests/agents/dhcp.pp

@@ -197,12 +197,6 @@ class neutron::agents::dhcp (
     'DEFAULT/rpc_response_max_timeout':  value => $rpc_response_max_timeout;
   }
 
-  # DEFAULT/ovs_intergation_bridge was deprecated in favor of
-  # ovs/intergation_bridge. Make sure to purge the old parameter
-  neutron_dhcp_agent_config {
-    'DEFAULT/ovs_integration_bridge': ensure => 'absent'
-  }
-
   if $ovsdb_connection =~ /^ssl:/ {
     $req_ssl_opts = {
       'ovsdb_agent_ssl_key_file'  => $ovsdb_agent_ssl_key_file,

manifests/server.pp

@@ -349,12 +349,6 @@ class neutron::server (
     'ovs/igmp_snooping_enable':                 value => $igmp_snooping_enable;
   }
 
-  # DEFAULT/ovs_intergation_bridge was deprecated in favor of
-  # ovs/intergation_bridge. Make sure to purge the old parameter
-  neutron_config {
-    'DEFAULT/ovs_integration_bridge': ensure => 'absent'
-  }
-
   if $server_package {
     package { 'neutron-server':
       ensure => $package_ensure,