How to Hide the "Geo Location" Admin Menu

function plt_hide_geo_targetly_geo_location_menus() {
	//Hide the "Geo Location" menu.
	remove_menu_page('geotargetly_geo_location');
}

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

Where do I put this code?