How to remove "Powered by Blogger" by hiding it:
One way of removing "powered by Blogger" from your blog is to hide it.
To do so, simply add this rule to your template:
#Attribution1 {display: none;}
Note: Hiding elements on your blog can have downsides, if the search-engines think that you are trying to deceive them. Use this technique at your own risk.
Mobile template blogs:
The approach above only works on your non-mobile template. If you have enabled a custom mobile template, you can either use the standard way of removing your attribution from your mobile blog, or by adding a 2nd rule:
.mobile #Attribution1 {display: none;}
