WooCommerce disable New Order email for Admin/ShopManager orders.

functions.php

<?php
// Change new order email recipient for registered customers
function wc_change_admin_new_order_email_recipient( $recipient, $order ) {
	global $woocommerce;
	if($order) 
	{
		 $order_data = $order->get_data();
		if('checkout' == $order_data['created_via']) {
			$recipient = "[email protected]"; // don't forget to put your actual email
		} else {
			$recipient = "";
		}
	}
	return $recipient;
}
add_filter('woocommerce_email_recipient_new_order', 'wc_change_admin_new_order_email_recipient', 1, 2);