Remove third_party/golang.org/x/mobile as it is no longer used with Go 1.5.

third_party/go/src/golang.org/x/mobile/bind/testdata/structs.go.golden

-// Package go_structs is an autogenerated binder stub for package structs.
-//   gobind -lang=go structs
-//
-// File is generated by gobind. Do not edit.
-package go_structs
-
-import (
-        "golang.org/x/mobile/bind/seq"
-        "structs"
-)
-
-const (
-        proxySDescriptor = "go.structs.S"
-        proxySXGetCode   = 0x00f
-        proxySXSetCode   = 0x01f
-        proxySYGetCode   = 0x10f
-        proxySYSetCode   = 0x11f
-        proxySSumCode    = 0x00c
-)
-
-type proxyS seq.Ref
-
-func proxySXSet(out, in *seq.Buffer) {
-        ref := in.ReadRef()
-        v := in.ReadFloat64()
-        ref.Get().(*structs.S).X = v
-}
-
-func proxySXGet(out, in *seq.Buffer) {
-        ref := in.ReadRef()
-        v := ref.Get().(*structs.S).X
-        out.WriteFloat64(v)
-}
-
-func proxySYSet(out, in *seq.Buffer) {
-        ref := in.ReadRef()
-        v := in.ReadFloat64()
-        ref.Get().(*structs.S).Y = v
-}
-
-func proxySYGet(out, in *seq.Buffer) {
-        ref := in.ReadRef()
-        v := ref.Get().(*structs.S).Y
-        out.WriteFloat64(v)
-}
-
-func proxySSum(out, in *seq.Buffer) {
-        ref := in.ReadRef()
-        v := ref.Get().(*structs.S)
-        res := v.Sum()
-        out.WriteFloat64(res)
-}
-
-func init() {
-        seq.Register(proxySDescriptor, proxySXSetCode, proxySXSet)
-        seq.Register(proxySDescriptor, proxySXGetCode, proxySXGet)
-        seq.Register(proxySDescriptor, proxySYSetCode, proxySYSet)
-        seq.Register(proxySDescriptor, proxySYGetCode, proxySYGet)
-        seq.Register(proxySDescriptor, proxySSumCode, proxySSum)
-}
-
-func init() {
-}