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/event/touch.go

Index: third_party/go/src/golang.org/x/mobile/event/touch.go
diff --git a/third_party/go/src/golang.org/x/mobile/event/touch.go b/third_party/go/src/golang.org/x/mobile/event/touch.go
deleted file mode 100644
index f18a7c89bf041409afc27302e6f0342dd7efd430..0000000000000000000000000000000000000000
--- a/third_party/go/src/golang.org/x/mobile/event/touch.go
+++ /dev/null
@@ -1,66 +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 event defines user input events.
-package event // import "golang.org/x/mobile/event"
-
-/*
-The best source on android input events is the NDK: include/android/input.h
-
-iOS event handling guide:
-https://developer.apple.com/library/ios/documentation/EventHandling/Conceptual/EventHandlingiPhoneOS
-*/
-
-import (
-	"fmt"
-
-	"golang.org/x/mobile/geom"
-)
-
-// Touch is a user touch event.
-//
-// On Android, this is an AInputEvent with AINPUT_EVENT_TYPE_MOTION.
-// On iOS, it is the UIEvent delivered to a UIView.
-type Touch struct {
-	Type TouchType
-	Loc  geom.Point
-}
-
-func (t Touch) String() string {
-	var ty string
-	switch t.Type {
-	case TouchStart:
-		ty = "start"
-	case TouchMove:
-		ty = "move "
-	case TouchEnd:
-		ty = "end  "
-	}
-	return fmt.Sprintf("Touch{ %s, %s }", ty, t.Loc)
-}
-
-// TouchType describes the type of a touch event.
-type TouchType byte
-
-const (
-	// TouchStart is a user first touching the device.
-	//
-	// On Android, this is a AMOTION_EVENT_ACTION_DOWN.
-	// On iOS, this is a call to touchesBegan.
-	TouchStart TouchType = iota
-
-	// TouchMove is a user dragging across the device.
-	//
-	// A TouchMove is delivered between a TouchStart and TouchEnd.
-	//
-	// On Android, this is a AMOTION_EVENT_ACTION_MOVE.
-	// On iOS, this is a call to touchesMoved.
-	TouchMove
-
-	// TouchEnd is a user no longer touching the device.
-	//
-	// On Android, this is a AMOTION_EVENT_ACTION_UP.
-	// On iOS, this is a call to touchesEnded.
-	TouchEnd
-)