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/example/sprite/make.bat

Index: third_party/go/src/golang.org/x/mobile/example/sprite/make.bat
diff --git a/third_party/go/src/golang.org/x/mobile/example/sprite/make.bat b/third_party/go/src/golang.org/x/mobile/example/sprite/make.bat
deleted file mode 100755
index 5dab3f9742eb5861b77e6c7fe8b7f9548cb7f46d..0000000000000000000000000000000000000000
--- a/third_party/go/src/golang.org/x/mobile/example/sprite/make.bat
+++ /dev/null
@@ -1,44 +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.
-
-@echo off
-
-setlocal
-
-if not exist make.bat goto error-invalid-path
-
-if not exist jni\armeabi mkdir jni\armeabi
-
-set CGO_ENABLED=1
-set GOOS=android
-set GOARCH=arm
-set GOARM=7
-
-go build -ldflags="-shared" -o jni/armeabi/libsprite.so .
-if errorlevel 1 goto error-go-build
-
-if defined NDK_ROOT goto ndk-build
-echo NDK_ROOT path not defined
-goto end
-
-:ndk-build
-call %NDK_ROOT%\ndk-build.cmd NDK_DEBUG=1 >nul
-
-if defined ANT_HOME goto ant-build
-echo ANT_HOME path not defined
-goto end
-
-:ant-build
-call %ANT_HOME%\bin\ant.bat debug >nul
-goto end
-
-:error-invalid-path
-echo make.bat must be run from %%GOPATH%%\src\golang.org\x\mobile\example\sprite
-goto end
-
-:error-go-build
-echo Error building go lib
-goto end
-
-:end