2.  Click on Edit HTML

  3.  Click Proceed

  4.  Check the box for Expand Widget Templates

  5.  Search for the following word: feedLinksBody
  6.  Remove this line:
        <b:include data='feedLinks' name='feedLinksBody'/>
  7.  Click Save template

  8.  Click Close


The following video demonstrates how to remove Subscribe to: Posts (Atom) in Blogger:

https://www.youtube.com/watch?feature=player_embedded&v=xIyZ9i_OH6I