How remove trashed WooCommerce orders from wc_get_orders() result?

Use Wp_Query instead it will give you the option to get data with status.

$args = array(
  'post_type' => 'shop_order',
 'posts_per_page' => '-1',
'post_status' => array('publish', 'pending', 'draft', 'auto-draft', 'future','private', 'inherit', 'trash')  
);

$my_query = new WP_Query($args);

$orders = $my_query->posts;

echo "<pre>";
print_r($orders);
echo "</pre>";

it will display All of your order.

hope this will help you out.