libnetwork/iptables: DeleteConntrackEntries: remove "totals" returns

There's nothing handling these results, and they're logged as debug-logs,
so we may as well remove the returned variables.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

libnetwork/iptables/conntrack.go

@@ -25,9 +25,9 @@ func checkConntrackProgrammable(nlh *netlink.Handle) error {
 
 // DeleteConntrackEntries deletes all the conntrack connections on the host for the specified IP
 // Returns the number of flows deleted for IPv4, IPv6 else error
-func DeleteConntrackEntries(nlh *netlink.Handle, ipv4List []net.IP, ipv6List []net.IP) (uint, uint, error) {
+func DeleteConntrackEntries(nlh *netlink.Handle, ipv4List []net.IP, ipv6List []net.IP) error {
 	if err := checkConntrackProgrammable(nlh); err != nil {
-		return 0, 0, err
+		return err
 	}
 
 	var totalIPv4FlowPurged uint
@@ -54,7 +54,7 @@ func DeleteConntrackEntries(nlh *netlink.Handle, ipv4List []net.IP, ipv6List []n
 		log.G(context.TODO()).Debugf("DeleteConntrackEntries purged ipv4:%d, ipv6:%d", totalIPv4FlowPurged, totalIPv6FlowPurged)
 	}
 
-	return totalIPv4FlowPurged, totalIPv6FlowPurged, nil
+	return nil
 }
 
 func DeleteConntrackEntriesByPort(nlh *netlink.Handle, proto types.Protocol, ports []uint16) error {