Code-Snippets-Functions/Execute a function on a child site/WooCommerce/hide-subtotal-line-from-admin-order-totals.txt

add_action('admin_head', 'admin_head_shop_order_inline_css' );
function admin_head_shop_order_inline_css() {
    global $pagenow, $typenow;

    // Targeting WooCommerce admin single orders
    if ( in_array( $pagenow, ['post.php', 'post-new.php'] ) && $typenow === 'shop_order' ) :
    ?><style>table.wc-order-totals tr:first-child{display:none;}</style><?php
    endif;
}