netlink/netlink_linux.go
func NetworkLinkDelIp(iface *net.Interface, ip net.IP, ipNet *net.IPNet) error {
	return networkLinkIpAction(
		syscall.RTM_DELADDR,
		syscall.NLM_F_ACK,
		IfAddr{iface, ip, ipNet},
	)
}
func NetworkLinkDelIp(iface *net.Interface, ip net.IP, ipNet *net.IPNet) error {
	return networkLinkIpAction(
		syscall.RTM_DELADDR,
		syscall.NLM_F_ACK,
		IfAddr{iface, ip, ipNet},
	)
}
// Delete an IP address from an interface. This is identical to:
// ip addr del $ip/$ipNet dev $iface