Quick snippet that prevents cart fragments from being updated in WooCommerce.

snippet.php

<?php
// Download this snippet as a plugin and more at: https://wordbits.io/snippet/stop-cart-fragments-from-updating-in-woocommerce/
// Created by: jeffmatson
?>

<?php
add_action( 'wp_print_scripts', 'nuke_cart_fragments', 100 );

function nuke_cart_fragments() {
    wp_dequeue_script( 'wc-cart-fragments' );

    return true;
}