How to remove the blogger nav bar?

To hide the Blogger Navbar :
1. Log in to blogger
2. On your Dashboard, select Layout. This will take you to the Template tab. Click Edit HTML. Under the Edit Template section you will see you blog's HTML.
3. paste the CSS definition in the top of the template code:

<b:skin><![CDATA[/*
-----------------------------------------------
Blogger Template Style
Name:     Rounders
Designer: Douglas Bowman
URL:      www.stopdesign.com
Date:     27 Feb 2004
Updated by: Blogger Team
----------------------------------------------- */

#navbar-iframe {
   display: none !important;
}

body .navbar {
    height: 0px !important;;
}