How to Hide IgnitionDeck Admin Menus

function plt_hide_ignitiondeck_menus() {
	//Hide "Plugins → Install Plugins".
	remove_submenu_page('plugins.php', 'idf-plugins');

	//Hide "IgnitionDeck".
	remove_menu_page('idf');
	//Hide "IgnitionDeck → Setup".
	remove_submenu_page('idf', 'idf');
	//Hide "IgnitionDeck → Install".
	remove_submenu_page('idf', 'idf-install');
	//Hide "IgnitionDeck → Configure".
	remove_submenu_page('idf', 'idf-configure');
	//Hide "IgnitionDeck → Upgrade".
	remove_submenu_page('idf', 'idf-upgrade');
	//Hide "IgnitionDeck → Themes".
	remove_submenu_page('idf', 'idf-themes');
	//Hide "IgnitionDeck → Connect".
	remove_submenu_page('idf', 'idf-connect');
}

add_action('admin_menu', 'plt_hide_ignitiondeck_menus', 101);
Where do I put this code?