How to Hide GeoTargeting Lite Admin Menus

function plt_hide_geotargeting_menus() {
	//Hide the "GeoTargeting" menu.
	remove_menu_page('geot-settings');
	//Hide the "GeoTargeting → Settings" menu.
	remove_submenu_page('geot-settings', 'geot-settings');
	//Hide the "GeoTargeting → Ip test" menu.
	remove_submenu_page('geot-settings', 'geot-ip-test');
}

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

Where do I put this code?