How to Hide Calculated Fields Form Admin Menus

function plt_hide_calculated_fields_form_menus() {
	//Hide "Settings → Calculated Fields Form".
	remove_submenu_page('options-general.php', 'cp_calculated_fields_form');

	//Hide "Calculated Fields Form".
	remove_menu_page('cp_calculated_fields_form');
	//Hide "Calculated Fields Form → Calculated Fields Form".
	remove_submenu_page('cp_calculated_fields_form', 'cp_calculated_fields_form');
	//Hide "Calculated Fields Form → Documentation".
	remove_submenu_page('cp_calculated_fields_form', 'cp_calculated_fields_form_sub2');
	//Hide "Calculated Fields Form → Online Help".
	remove_submenu_page('cp_calculated_fields_form', 'cp_calculated_fields_form_sub4');
	//Hide "Calculated Fields Form → Upgrade".
	remove_submenu_page('cp_calculated_fields_form', 'cp_calculated_fields_form_sub3');
}

add_action('admin_menu', 'plt_hide_calculated_fields_form_menus', 11);

Where do I put this code?