How to Hide Advanced Shipping Validation for WooCommerce Meta Boxes

function plt_hide_advanced_shipping_validation_for_woocommerce_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Shipping validation conditions" meta box.
	remove_meta_box('wcasv_conditions', $screen->id, 'normal');
	//Hide the "Validation settings" meta box.
	remove_meta_box('wcasv_settings', $screen->id, 'normal');
}

add_action('add_meta_boxes', 'plt_hide_advanced_shipping_validation_for_woocommerce_metaboxes', 20);

Where do I put this code?