Android: Remove unneeded RegisterNatives() calls

base/test/test_ui_thread_android.cc

 // Copyright 2015 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 "base/test/test_ui_thread_android.h"
 
 #include "jni/TestUiThread_jni.h"
 
 namespace base {
 
 void StartTestUiThreadLooper() {
   Java_TestUiThread_loop(base::android::AttachCurrentThread());
 }
 
-bool RegisterTestUiThreadAndroid(JNIEnv* env) {
-  return RegisterNativesImpl(env);
-}
-
 }  // namespace base