Storefront Child Theme and Woocommerce Shopping Cart

I am using Storefront Theme 1.4.6 and woocommerce 2.4.6. I cannot seem to remove the woocommerce shopping cart in the navigation menu.

I tried the following code, but it does not work.
‘add_action( ‘init’, ‘jk_remove_storefront_cart’ );
function jk_remove_storefront_cart() {
remove_action( ‘storefront_header’, ‘storefront_header_cart’, 60 );
}’

I get the following error message when using the above code in a Storefront Child theme. Warning: Cannot modify header information – headers already sent by (output started at /var/www/volumes/xvdf3/vhosts/pumpsselection.com/httpdocs/test/wp-content/themes/storefront-child/functions.php:33) in /var/www/volumes/xvdf3/vhosts/pumpsselection.com/httpdocs/test/wp-includes/pluggable.php on line 1207

I tried changing the priority from 60 to 70 and 60 to 40 and 50. I still get the error.

I am not sure what to do.

Any help would be much appreciated.