Remove customer meta_data from WC REST API response

functions.php

<?php 

function my_custom_rest_prepare_customer( $response ){
  if( function_exists('is_pos') && is_pos() ) {
    $data = $response->get_data();
    $data['meta_data'] = array(); // remove meta_data
    $response->set_data($data);
  }
  return $response;
}

add_filter( 'woocommerce_rest_prepare_customer', 'my_custom_rest_prepare_customer' );