In this post, i will tell you the way of hiding and removing the blogger navigation bar. there are many features of a blogger, some are very good but few are not liked by people. because of blogger navigation bar, you need not to worry. you can remove it by putting a single code in template.
Go to Blogger Dashboard > Edit Html and search for <b:skin><![CDATA[
Place following code just after
display: none !important;
Click on Save Template and you had done.
I hope your blogger navigation bar will be removed by this way.