How to Hide Perseo Software Admin Menus

function plt_hide_perseo_software_menus() {
	//Hide the "Perseo Software" menu.
	remove_menu_page('mperseo_menupage');
	//Hide the "Perseo Software → Perseo Software" menu.
	remove_submenu_page('mperseo_menupage', 'mperseo_menupage');
	//Hide the "Perseo Software → Parametrizacion" menu.
	remove_submenu_page('mperseo_menupage', '');
}

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

Where do I put this code?