Android: Remove unneeded RegisterNatives() calls

chrome/browser/password_manager/credential_android.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_PASSWORD_MANAGER_CREDENTIAL_ANDROID_H_
 #define CHROME_BROWSER_PASSWORD_MANAGER_CREDENTIAL_ANDROID_H_
 
 #include <stddef.h>
 
 #include "base/android/jni_array.h"
 #include "base/android/scoped_java_ref.h"
 #include "components/autofill/core/common/password_form.h"
 
 // Creates Java counterpart of autofill::PasswordForm, assigning it a |position|
 // in case form is part of some array of forms and |type| which should be either
 // local or federated.
 base::android::ScopedJavaLocalRef<jobject> CreateNativeCredential(
     JNIEnv* env,
     const autofill::PasswordForm& password_form,
     int position,
     int type);
 
 // Creates Java Credential[] array of size |size|.
 base::android::ScopedJavaLocalRef<jobjectArray> CreateNativeCredentialArray(
     JNIEnv* env,
     size_t size);
 
-// Registers the Credential native method.
-bool RegisterCredential(JNIEnv* env);
-
 #endif  // CHROME_BROWSER_PASSWORD_MANAGER_CREDENTIAL_ANDROID_H_