Remove openglui embedder code

runtime/embedders/openglui/android/android_resource.h

-// Copyright (c) 2012, 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_RESOURCE_H_
-#define EMBEDDERS_OPENGLUI_ANDROID_ANDROID_RESOURCE_H_
-
-#include <android_native_app_glue.h>
-
-#include "embedders/openglui/common/log.h"
-#include "embedders/openglui/common/resource.h"
-
-class AndroidResource : public Resource {
-  public:
-    AndroidResource(android_app* application, const char* path)
-        : Resource(path),
-          asset_manager_(application->activity->assetManager),
-          asset_(NULL) {
-    }
-
-    int32_t descriptor() {
-      if (Open() == 0) {
-        descriptor_ = AAsset_openFileDescriptor(asset_, &start_, &length_);
-        LOGI("%s has start %d, length %d, fd %d",
-             path_, static_cast<int>(start_), static_cast<int>(length_),
-             descriptor_);
-        return descriptor_;
-      }
-      return -1;
-    }
-
-    off_t length() {
-      if (length_ < 0) {
-        length_ = AAsset_getLength(asset_);
-      }
-      return length_;
-    }
-
-    int32_t Open() {
-      LOGI("Attempting to open asset %s", path_);
-      asset_ = AAssetManager_open(asset_manager_, path_, AASSET_MODE_UNKNOWN);
-      if (asset_ != NULL) {
-        return 0;
-      }
-      LOGE("Could not open asset %s", path_);
-      return -1;
-    }
-
-    void Close() {
-      if (asset_ != NULL) {
-        AAsset_close(asset_);
-        asset_ = NULL;
-      }
-    }
-
-    int32_t Read(void* buffer, size_t count) {
-      size_t actual = AAsset_read(asset_, buffer, count);
-      return (actual == count) ? 0 : -1;
-    }
-
-  private:
-    AAssetManager* asset_manager_;
-    AAsset* asset_;
-};
-
-#endif  // EMBEDDERS_OPENGLUI_ANDROID_ANDROID_RESOURCE_H_
-