Disable emails for new user registration

I want to disable the default email that is send when user is registered.
I am using this plugin for email verification User Verification
By PickPlugins, which sends an email with confirmation link, but the problem is that by default and WordPress send an email via pluggable.php:

function wp_new_user_notification( $user_id, $deprecated = null, $notify = '' ){...}

I am using a theme (which I am extending with a child theme), which calls wp_create_user. I have replaced that parent theme function and in my functions.php I have added:

add_action( 'init', function(){
    remove_action( 'register_new_user',   'wp_send_new_user_notifications'         
);

add_action(    'register_new_user',   'wpse236122_send_new_user_notifications' );
});

function wpse236122_send_new_user_notifications(  $user_id, $notify = 'user' ){
    wp_send_new_user_notifications( $user_id, $notify  );
}

The problem is, it still send both emails, from the plugin and default WordPress email for new user registration. I don’t know how to disable this email.