Hide certain attributes from Woocommerce emails

Hi,

I have lots of attributes for my woocommerce products, but I want to hide some of them. I managed to hide them in the frontend with css but how can I do it in the emails?

I’ve tried some things in the “email-order-items.php but can’t figure it out.

foreach ( $items as $item ) :
	$_product     = apply_filters( 'woocommerce_order_item_product', $order->get_product_from_item( $item ), $item );
	$item_meta    = new WC_Order_Item_Meta( $item['item_meta'], $_product );

eg. an attribute (meta) I want to hide is named “pa_stroller-color”

What code do I have to add?

thanks
Johanna