How to Hide ThemeRegion Companion Admin Menus

function plt_hide_themeregion_companion_menus() {
	//Hide "Portfolio".
	remove_menu_page('edit.php?post_type=folio');
	//Hide "Portfolio → All Items".
	remove_submenu_page('edit.php?post_type=folio', 'edit.php?post_type=folio');
	//Hide "Portfolio → Add New Item".
	remove_submenu_page('edit.php?post_type=folio', 'post-new.php?post_type=folio');
	//Hide "Portfolio → Category".
	remove_submenu_page('edit.php?post_type=folio', 'edit-tags.php?taxonomy=folio_category&post_type=folio');
	//Hide "Portfolio → Tags".
	remove_submenu_page('edit.php?post_type=folio', 'edit-tags.php?taxonomy=folio_tag&post_type=folio');
}

add_action('admin_menu', 'plt_hide_themeregion_companion_menus', 15);
Where do I put this code?