Fix dependencies

vendor/golang.org/x/net/ipv6/sockopt.go

@@ -1,43 +0,0 @@
-// Copyright 2014 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.
-
-package ipv6
-
-import "golang.org/x/net/internal/socket"
-
-// Sticky socket options
-const (
-	ssoTrafficClass        = iota // header field for unicast packet, RFC 3542
-	ssoHopLimit                   // header field for unicast packet, RFC 3493
-	ssoMulticastInterface         // outbound interface for multicast packet, RFC 3493
-	ssoMulticastHopLimit          // header field for multicast packet, RFC 3493
-	ssoMulticastLoopback          // loopback for multicast packet, RFC 3493
-	ssoReceiveTrafficClass        // header field on received packet, RFC 3542
-	ssoReceiveHopLimit            // header field on received packet, RFC 2292 or 3542
-	ssoReceivePacketInfo          // incbound or outbound packet path, RFC 2292 or 3542
-	ssoReceivePathMTU             // path mtu, RFC 3542
-	ssoPathMTU                    // path mtu, RFC 3542
-	ssoChecksum                   // packet checksum, RFC 2292 or 3542
-	ssoICMPFilter                 // icmp filter, RFC 2292 or 3542
-	ssoJoinGroup                  // any-source multicast, RFC 3493
-	ssoLeaveGroup                 // any-source multicast, RFC 3493
-	ssoJoinSourceGroup            // source-specific multicast
-	ssoLeaveSourceGroup           // source-specific multicast
-	ssoBlockSourceGroup           // any-source or source-specific multicast
-	ssoUnblockSourceGroup         // any-source or source-specific multicast
-	ssoAttachFilter               // attach BPF for filtering inbound traffic
-)
-
-// Sticky socket option value types
-const (
-	ssoTypeIPMreq = iota + 1
-	ssoTypeGroupReq
-	ssoTypeGroupSourceReq
-)
-
-// A sockOpt represents a binding for sticky socket option.
-type sockOpt struct {
-	socket.Option
-	typ int // hint for option value type; optional
-}