Android: Remove unneeded RegisterNatives() calls

chrome/browser/ui/android/snackbars/auto_signin_prompt_controller.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_ANDROID_SNACKBARS_AUTO_SIGNIN_PROMPT_CONTROLLER_H_
 #define CHROME_BROWSER_UI_ANDROID_SNACKBARS_AUTO_SIGNIN_PROMPT_CONTROLLER_H_
 
 #include <jni.h>
 
 #include "base/strings/string16.h"
 
 namespace content {
 class WebContents;
 }
 
 // Shows an auto sign-in prompt in order to inform the users that they were
 // automatically signed in to the website. |username| is the username used by
 // the user in order to login to the web site, it can be email, telephone number
 // or any string.
 void ShowAutoSigninPrompt(content::WebContents* web_contents,
                           const base::string16& username);
 
-// Register native method.
-bool RegisterAutoSigninSnackbarController(JNIEnv* env);
-
 #endif  // CHROME_BROWSER_UI_ANDROID_SNACKBARS_AUTO_SIGNIN_PROMPT_CONTROLLER_H_