android_webview: Remove unneeded RegisterNatives() calls

android_webview/native/aw_contents_lifecycle_notifier.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 "android_webview/native/aw_contents_lifecycle_notifier.h"
 
 #include "jni/AwContentsLifecycleNotifier_jni.h"
 
 using base::android::AttachCurrentThread;
 
 namespace android_webview {
 
-bool RegisterAwContentsLifecycleNotifier(JNIEnv* env) {
-  return RegisterNativesImpl(env);
-}
-
 // static
 void AwContentsLifecycleNotifier::OnWebViewCreated() {
   Java_AwContentsLifecycleNotifier_onWebViewCreated(AttachCurrentThread());
 }
 
 // static
 void AwContentsLifecycleNotifier::OnWebViewDestroyed() {
   Java_AwContentsLifecycleNotifier_onWebViewDestroyed(AttachCurrentThread());
 }
 
 }  // namespace android_webview