diff --git a/cluster_upgrade/objects/adapters.py b/cluster_upgrade/objects/adapters.py
index a4495a9..7a2854e 100644
--- a/cluster_upgrade/objects/adapters.py
+++ b/cluster_upgrade/objects/adapters.py
@@ -131,10 +131,6 @@ class NailgunNetworkManager(object):
     def assign_given_vips_for_net_groups(self, vips):
         self.net_manager.assign_given_vips_for_net_groups(self.cluster, vips)
 
-    def get_admin_network_group(self, node_id=None):
-        ng = objects.NetworkGroup.get_admin_network_group(node_id)
-        return NailgunNetworkGroupAdapter(ng)
-
     def set_node_netgroups_ids(self, node, mapping):
         return objects.Node.set_netgroups_ids(node.node, mapping)