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functions.php

/**
 * Add Remove button to WooCommerce checkout page - cart items  
 */ 

add_filter('woocommerce_cart_item_name', 'mycomputer_filter_wc_cart_item_remove_link', 10, 3);

function mycomputer_filter_wc_cart_item_remove_link($product_name, $cart_item, $cart_item_key)
{
  
    if (is_checkout()) {

        $product_name .= apply_filters('woocommerce_cart_item_remove_link', sprintf(
            '<a href="%s" rel="nofollow" class="remove-icon" style="float:left;">x</a>',
            esc_url(WC_Cart::get_remove_url($cart_item_key)),
            __('Remove this item', 'woocommerce'),
            esc_attr($cart_item['product_id']),
            esc_attr($cart_item['data']->get_sku())
        ), $cart_item_key);

        return $product_name;
    }

}