WooCommerce Remove Shipping Tax from Order Total

functions.php

<?php
function action_woocommerce_calculate_totals( ) { 
    global $woocommerce;
    
    $woocommerce->cart->shipping_tax_total = 0;
}; 

add_action( 'woocommerce_calculate_totals', 'action_woocommerce_calculate_totals', 10, 1 );