Step 1. Log in to your Dashboard, go to Template > Edit HTML
Step 2. Click anywhere inside the code area and press the CTRL + F keys to open the Blogger' search box
</head>Step 4. Just above </head> add this code:
<style>Step 5. Click on the Save Template button to save the changes.
#Attribution1 {
display: none;
}
</style>
That was all !