[Disable update and account mails] Disable all succesfull update mails and user registration emails #wordpress

auto_core_update_send_email.php

add_filter( 'auto_core_update_send_email', 'disable_auto_core_updates', 10, 4);
add_filter( 'admin_email_check_interval', '__return_false' );
add_action( 'init', 'dev_disable_new_user_notifications' );

//Disable the updated feature notification emails
function disable_auto_core_updates( $send, $type, $core_update, $result ) {
		
    if ( ! empty( $type ) && $type == 'success' ) {
        return false;
    }

    return $send;
}

//Disable the new user notification sent to the site admin
function dev_disable_new_user_notifications() {
 //Remove original use created emails
 remove_action( 'register_new_user', 'wp_send_new_user_notifications' );
 remove_action( 'edit_user_created_user', 'wp_send_new_user_notifications', 10, 2 );
 
 //Add new function to take over email creation
 add_action( 'register_new_user', 'dev_send_new_user_notifications' );
 add_action( 'edit_user_created_user', 'dev_send_new_user_notifications', 10, 2 );
}
function dev_send_new_user_notifications( $user_id, $notify = 'user' ) {
 if ( empty($notify) || $notify == 'admin' ) {
 return;
 }elseif( $notify == 'both' ){
 //Only send the new user their email, not the admin
 $notify = 'user';
 }
 wp_send_new_user_notifications( $user_id, $notify );
}