How to Hide Downloads for logged in users Admin Menus

function plt_hide_downloads_for_logged_in_users_menus() {
	//Hide "Downloads".
	remove_menu_page('edit.php?post_type=dcwd_simple_download');
	//Hide "Downloads → All downloads".
	remove_submenu_page('edit.php?post_type=dcwd_simple_download', 'edit.php?post_type=dcwd_simple_download');
	//Hide "Downloads → Add new download".
	remove_submenu_page('edit.php?post_type=dcwd_simple_download', 'post-new.php?post_type=dcwd_simple_download');
	//Hide "Downloads → Categories".
	remove_submenu_page('edit.php?post_type=dcwd_simple_download', 'edit-tags.php?taxonomy=category&post_type=dcwd_simple_download');
}

add_action('admin_menu', 'plt_hide_downloads_for_logged_in_users_menus', 15);

Where do I put this code?