The blogger attribution comes by default in the footer of your blog and if you have tried to remove this then you might have noticed that this is locked into your blog.

To unlock it, you can follow the next five simple steps to remove the blogger attribution

Step 1: 

Log in to your blog dashboard, navigate to 'Template' and click on 'Edit HTML'

Blog Dashboard

Step 2:

Click anywhere inside the code area and press CTRL + F keys to open the blogger search box

Step 3:

Type or paste the following tag inside the search box, then hit Enter to find it.

</head>

 similar to this,
Blogger Search box




Step 4:

Just above the </head> tag, add the following code

<style>
#Attribution1 {
display: none;
}
</style>
similar to this,
Code area





Step 5:

Click on the 'Save Template' button to save the changes

It's all been done.