How to remove NavBar from a blog (blogger.com)

Go to your blog's customize page and then on the Layout tab select Edit HTML.
In that in Edit Template section just enter the following code.
paste Code as in Example.

----- Code ------

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

------End Code--------

------ Example ------------

Blogger Template Style
Name: Rounders 2
Designer: Douglas Bowman
URL: www.stopdesign.com
Date: 27 Feb 2004
Updated by: Blogger Team
----------------------------------------------- */

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

/* Variable definitions

---------- End of Example ----------------