Dont worry i have the solution for it.
Follow the steps:
1. Log in into your blog.
2. Goto Layout.
3. Click on Edit HTML.
4. Don't Expand Widget Template
5. Now find the following
" /* Variable definitions "
6. Above this paste the following code(without quote)
" #navbar-iframe { display: none !important; } "
Now you are done.
7. Now save the changes and see your blog
The Navbar is now gone.
Follow the steps:
1. Log in into your blog.
2. Goto Layout.
3. Click on Edit HTML.
4. Don't Expand Widget Template
5. Now find the following
" /* Variable definitions "
6. Above this paste the following code(without quote)
" #navbar-iframe { display: none !important; } "
Now you are done.
7. Now save the changes and see your blog
The Navbar is now gone.