code review 5294074: src/pkg/[n-z]*: gofix -r error

src/pkg/net/interface_openbsd.go

 // Copyright 2011 The Go Authors.  All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 // Network interface identification for OpenBSD
 
 package net
 
-import "os"
-
 // If the ifindex is zero, interfaceMulticastAddrTable returns
 // addresses for all network interfaces.  Otherwise it returns
 // addresses for a specific interface.
-func interfaceMulticastAddrTable(ifindex int) ([]Addr, os.Error) {
+func interfaceMulticastAddrTable(ifindex int) ([]Addr, error) {
         return nil, nil
 }