Hello, I want to diasble the images and found via the search function the code snippet

add_filter(‘wppizza_cpt_args’,’my_wppizza_cpt_arguments’);
function my_wppizza_cpt_arguments($args){
/**disable comments**/
$supp=array_flip($args[‘supports’]);
$cid=$supp[‘comments’];
unset($args[‘supports’][$cid]);

/**disable featured images**/
$supp=array_flip($args[‘supports’]);
$cid=$supp[‘thumbnail’];
unset($args[‘supports’][$cid]);
return $args;
}

But where I must add this? In my theme functions.php I try it out but it do not work. Thanks for the help!