Remove Checkout fields woocommerce

<?php 
 /*Open up the wp-content/themes/themeXXXXX/includes/custom-function.php file. 
  *You may need to download it to your local system if you are using FTP, 
  *or you can access the file directly through your hosting file manager.
  *  Scroll down to the very end of the file and add the following code there:
  *
  *
  *
  *
  */
  
add_filter( 'woocommerce_checkout_fields' , 'custom_override_checkout_fields' );
  
function custom_override_checkout_fields( $fields ) {
//These are fields that you can unset
unset($fields['billing']['billing_first_name']);
unset($fields['billing']['billing_last_name']);
unset($fields['billing']['billing_company']);
unset($fields['billing']['billing_address_1']);
unset($fields['billing']['billing_address_2']);
unset($fields['billing']['billing_city']);
unset($fields['billing']['billing_postcode']);
unset($fields['billing']['billing_country']);
unset($fields['billing']['billing_state']);
unset($fields['billing']['billing_phone']);
unset($fields['order']['order_comments']);
unset($fields['billing']['billing_email']);
unset($fields['account']['account_username']);
unset($fields['account']['account_password']);
unset($fields['account']['account_password-2']);
 
    return $fields;
}
 
?>