Hides all admin notices in WooCommerce settings page.

hide_admin_notices.php

<?php
add_action( 'admin_print_scripts', 'hide_admin_notices' );
function hide_admin_notices() {

	global $wp_filter;

	if ( empty( $_REQUEST['page'] ) || 'wc-settings' !== $_REQUEST['page'] ) {
		return;
	}
	foreach ( array( 'user_admin_notices', 'admin_notices', 'all_admin_notices' ) as $wp_notice ) {
		if ( ! empty( $wp_filter[ $wp_notice ]->callbacks ) && is_array( $wp_filter[ $wp_notice ]->callbacks ) ) {
			foreach ( $wp_filter[ $wp_notice ]->callbacks as $priority => $hooks ) {
				foreach ( $hooks as $name => $arr ) {
					unset( $wp_filter[ $wp_notice ]->callbacks[ $priority ][ $name ] );
				}
			}
		}
	}
}