// Hide or remove the notice "Product removed. Undo?"
add_filter('woocommerce_cart_item_removed_notice_type', '__return_null');
// Hide “Added to Your Cart” Message
add_filter( 'wc_add_to_cart_message_html', '__return_false' );
// Hide “Cart updated” Message
add_filter('woocommerce_add_message', '__return_false');