Hi,

Try to add the following PHP code snippet to the child theme functions.php file to do this

function woodmart_remove_upsells() {
	remove_action( 'woodmart_before_sidebar_area', 'woocommerce_upsell_display', 20 );
	remove_action( 'woodmart_woocommerce_after_sidebar', 'woocommerce_upsell_display', 10 );
}
add_action( 'wp', 'woodmart_remove_upsells', 1100 );

Regards