Brian

The best way to do this is to *not* modify core files as stated above.

Rather, add this to your functions.php file:

function woocommerce_remove_related_products(){
    remove_action( 'woocommerce_after_single_product_summary', 'woocommerce_output_related_products', 20);
}
add_action('woocommerce_after_single_product_summary', 'woocommerce_remove_related_products');

Using this method, you will not lose any modifications when upgrading Woocommerce.

Select the screen options tab and select amount of columns.

You sir, are awesome. I was unaware you could echo shortcodes like that and I was looking for a standalone way to embed the slideshow on my index page. Thanks for the pro-tip.

It is possible that this is an aesthetic choice and not a problem, per se. ??