ui: Remove unneeded RegisterNatives() call on Android

ui/base/clipboard/clipboard_android.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/base/clipboard/clipboard_android.h"
 
 #include "base/android/context_utils.h"
 #include "base/android/jni_string.h"
 #include "base/lazy_instance.h"
 #include "base/stl_util.h"
@@ skipping 453 matching lines @@
   }
   g_map.Get().Set(kBitmapFormat, packed);
 }
 
 void ClipboardAndroid::WriteData(const Clipboard::FormatType& format,
                                  const char* data_data,
                                  size_t data_len) {
   g_map.Get().Set(format.ToString(), std::string(data_data, data_len));
 }
 
-bool RegisterClipboardAndroid(JNIEnv* env) {
-  return RegisterNativesImpl(env);
-}
-
 } // namespace ui