Hidden field Date error

Hi!

I’m trying remove the field Date using the code:

“add_filter(‘tb_show_date_book’, ‘func_hide_date_book’);
function func_hide_date_book($show) {
$show = false;

return $show;
}”

He worked for don’t show the field but the “BOOKING NOW” button return the message:
“invalid date check in”

I need don’t show field and remove to required.