It is very easy to remove "Newer Posts" and "Older Posts" Link from the footer of your blog Post . You are actually hiding it which can be rolled back by reversing this hack. Now lets start removing this link from your blog.

Search for the following Code in your Template.

#blog-pager-newer-link {
float: left;
}

#blog-pager-older-link {
float: right;
}

#blog-pager {
text-align: center;
}

Now replace the above code with this code.

#blog-pager-newer-link {
float: left;
display: none;
}

#blog-pager-older-link {
float: right;
display: none;
}

#blog-pager {
text-align: center;
display: none;
}

If you like to rollback this and want to show "Newer Posts" and "Older posts" Link then reverse this Process.