How can we delete a node from node list in BIG IP using f5-icontrol (RUBY)

I was trying to delete the node from node list using this command

bigip_node = F5::IControl.new(bigip_address, bigip_user, bigip_pass,['LocalLB.NodeAddress']).get_interfaces bigip_node["LocalLB.NodeAddress"].delete_node_address([some_ip_address])

I couldn't able to delete the node. Please help me in this.