Disable the WordPress 3.1 Admin Bar
An admin bar will be turned on by default in WordPress 3.1. For many WordPress users, this is just another thing that needs to be turned off. Ozh has already created a plugin that will disable the admin bar. If you’re playing around with WordPress on the bleeding edge, this plugin will be handy for you.
Bookmark the Disable Admin Bar plugin for use when WordPress 3.1 is released next month.