Tips on Customizing LCB Portfolio

How to Hide LCB Portfolio Admin Menus

function plt_hide_lcb_portfolio_menus() {
	//Hide "Settings → Portfolio".
	remove_submenu_page('options-general.php', 'lcb-portfolio-settings');

	//Hide "Portfolio".
	remove_menu_page('edit.php?post_type=portfolio');
	//Hide "Portfolio → Portfolio".
	remove_submenu_page('edit.php?post_type=portfolio', 'edit.php?post_type=portfolio');
	//Hide "Portfolio → Add new".
	remove_submenu_page('edit.php?post_type=portfolio', 'post-new.php?post_type=portfolio');
}

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

Where do I put this code?

How to Hide the "Potfolio url" Meta Box

function plt_hide_lcb_portfolio_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Potfolio url" meta box.
	remove_meta_box('url-portfolio', $screen->id, 'advanced');
}

add_action('add_meta_boxes', 'plt_hide_lcb_portfolio_metaboxes', 20);