Now you can permanently remove the blogger navbar instant of hiding it.Its really easy to hide. All you have to do is just add a bit of code in the template.
Earlier we used the CSS code to simply hide the navbar.
Just follow the steps below
1. Login to your Blogger >> Layout >> Edit HTML
2. Find <body> and add the following Code just above it.
<script type='text/javascript'>
<![CDATA[
<!--
/*<body>*/
-->
]]>
</script>
Click delete widgets and the navbar will be removed.
The main disadvantage of removing is that you will also remove Quick Edit pencil
or wrench links 
on your blog even if you are logged in.