How to Turn Off New User Notification Emails in WordPress only for admin

I am using register_new_user action to disable the email notification for admin but when a user register’s it still generates an email to admin.

I am using Gravity Forms for User Registration

Here is my code.

remove_action(‘register_new_user’, ‘wp_send_new_user_notifications’);
add_action(‘register_new_user’, ‘ecpd_send_new_user_notifications’);

function ecpd_send_new_user_notifications($user_id, $notify = ‘user’) {
wp_new_user_notification($user_id, null, $notify);
}

Any help will be greatly appreciated.