How to Hide the "TS Webfonts for XSERVER" Admin Menu

function plt_hide_xserver_typesquare_webfonts_menus() {
	//Hide the "TS Webfonts for XSERVER" menu.
	remove_menu_page('typesquare-admin-menu');
}

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

Where do I put this code?