Remove related products

wc-remove-related-products.php

<?php
  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');