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/cmd/gobind/main.go

Index: third_party/go/src/golang.org/x/mobile/cmd/gobind/main.go
diff --git a/third_party/go/src/golang.org/x/mobile/cmd/gobind/main.go b/third_party/go/src/golang.org/x/mobile/cmd/gobind/main.go
deleted file mode 100644
index 6ba74dee8c4e5f652f6071032aeb5bc3e4b390bc..0000000000000000000000000000000000000000
--- a/third_party/go/src/golang.org/x/mobile/cmd/gobind/main.go
+++ /dev/null
@@ -1,48 +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 main
-
-import (
-	"flag"
-	"fmt"
-	"go/build"
-	"log"
-	"os"
-)
-
-var (
-	lang   = flag.String("lang", "java", "target language for bindings, either java or go.")
-	outdir = flag.String("outdir", "", "result will be written to the directory instead of stdout.")
-)
-
-var usage = `The Gobind tool generates Java language bindings for Go.
-
-For usage details, see doc.go.`
-
-func main() {
-	flag.Parse()
-
-	cwd, err := os.Getwd()
-	if err != nil {
-		log.Fatal(err)
-	}
-	for _, arg := range flag.Args() {
-		pkg, err := build.Import(arg, cwd, 0)
-		if err != nil {
-			fmt.Fprintf(os.Stderr, "%s: %v\n", arg, err)
-			os.Exit(1)
-		}
-		genPkg(pkg)
-	}
-	os.Exit(exitStatus)
-}
-
-var exitStatus = 0
-
-func errorf(format string, args ...interface{}) {
-	fmt.Fprintf(os.Stderr, format, args...)
-	fmt.Fprintln(os.Stderr)
-	exitStatus = 1
-}