How to Remove 'Sort by' and 'showing all results' in the WooCommerce WordPress plug-in.

You can add this under Appearance > Customize > Additional CSS:

.woocommerce-result-count,
.woocommerce-ordering {
	display: none;
}

See: https://theme.co/apex/forums/topic/how-to-remove-sort-by-and-showing-all-results-from-woocommerce/