Primarily the reason for wanting this to go off is mostly for the looks. It takes space and it's not useful since RSS is used mostly. So I'll show you how to remove it fast and easy.
How to remove: Subscribe Post to Atom for Blogger
1. Log in to your blogger account and go to Template>Edit HTML
2. Click inside the code area and then press CTRL + F to open the blogger search.
3. Search for this line <b:include data='feedLinks' name='feedLinksBody'/>
4. Click save template and you've got it.
You have successfully removed Subscribe Post to Atom for Blogger.