Remove openglui embedder code

runtime/embedders/openglui/android/android_graphics_handler.h

Index: runtime/embedders/openglui/android/android_graphics_handler.h
diff --git a/runtime/embedders/openglui/android/android_graphics_handler.h b/runtime/embedders/openglui/android/android_graphics_handler.h
deleted file mode 100644
index c157d9552a6c5f0283eea02263016f3180e1f75d..0000000000000000000000000000000000000000
--- a/runtime/embedders/openglui/android/android_graphics_handler.h
+++ /dev/null
@@ -1,27 +0,0 @@
-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-#ifndef EMBEDDERS_OPENGLUI_ANDROID_ANDROID_GRAPHICS_HANDLER_H_
-#define EMBEDDERS_OPENGLUI_ANDROID_ANDROID_GRAPHICS_HANDLER_H_
-
-#include <android_native_app_glue.h>
-#include "embedders/openglui/common/graphics_handler.h"
-
-class AndroidGraphicsHandler : public GraphicsHandler {
-  public:
-    AndroidGraphicsHandler(android_app* application,
-                           const char* resource_path);
-
-    int32_t Start();
-    void Stop();
-
-  private:
-    android_app* application_;
-    EGLDisplay display_;
-    EGLSurface surface_;
-    EGLContext context_;
-};
-
-#endif  // EMBEDDERS_OPENGLUI_ANDROID_ANDROID_GRAPHICS_HANDLER_H_
-