The easy way is to hide it with some custom css. For help with this please post the url to a product page.
However, your site will have the overhead of selecting the related products and generating the markup. To avoid this, create a child theme:
http://codex.wordpress.org/Child_Themes
and put this in functions.php for your child theme:
<?php
remove_action( 'woocommerce_after_single_product_summary', 'woocommerce_output_related_products', 20);Sorry not possible for me to test it with you theme, but see how you go.