BuddyPress.org

If the actual snippet of code was parsed / rendered then it sounds as though you didn’t surround the code in the required PHP tags i.e:

<?php
remove_action(‘bp_adminbar_menus’, ‘bp_adminbar_login_menu’, 2);
?>

You do not really need to use a plugin and that suggeststhat it removes the entire adminbar? is that what you want?