Today with the help of some of my friends and members in the Webmaster forum WebCosmoForum, I have finally removed the blogger's bar which usually appears in the top of the free blogger (blogspot) blog.
Now, You can also rid of this blogger bar come across on the top of your blog, just follow these steps -
1. Log in to blogger account,
2. Then, go to your Dashboard, select Layout option. 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 this following CSS definition in the top of the template code:
display: none !important;
And that's all, it will not show to your blog then.
Thanks to all people helping me.