For WooCommerce Subscriptions, removes some of the strings during on the checkout page

subscriptions-remove-strings.php

<?php
/*
Don't copy the opening PHP tag
*/

add_filter( 'woocommerce_cart_item_subtotal', 'wooninja_display_subtotal', 20, 1 );
add_filter( 'woocommerce_cart_subtotal', 'wooninja_display_subtotal', 20, 1 );
add_filter( 'woocommerce_cart_total', 'wooninja_display_subtotal', 20, 1 );

function wooninja_display_subtotal( $subtotal ) {

 $regex = '#(<span class="amount">.*?</span>)#';
 if ( preg_match( $regex, $subtotal, $match ) ) {
  $subtotal = $match[0];
 }
 return $subtotal;
}