Remove openglui embedder code

runtime/embedders/openglui/emulator/emulator_embedder.h

Index: runtime/embedders/openglui/emulator/emulator_embedder.h
diff --git a/runtime/embedders/openglui/emulator/emulator_embedder.h b/runtime/embedders/openglui/emulator/emulator_embedder.h
deleted file mode 100644
index f0f0638bc2f019b0ef13017c5d2d74df6adc2d91..0000000000000000000000000000000000000000
--- a/runtime/embedders/openglui/emulator/emulator_embedder.h
+++ /dev/null
@@ -1,14 +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_EMULATOR_EMULATOR_EMBEDDER_H_
-#define EMBEDDERS_OPENGLUI_EMULATOR_EMULATOR_EMBEDDER_H_
-
-#include "include/dart_api.h"
-
-DART_EXPORT void emulator_main(int argc, char** argv,
-                               const char* script);
-
-#endif  // EMBEDDERS_OPENGLUI_EMULATOR_EMULATOR_EMBEDDER_H_
-