how to delete “change your information” in comment.php

Hi, I want to delete something from comment from my theme, but I would like to ask can I do it without to harm my site:)

I deleted php commands for Website field when someone leave comment on my blog, and I am satisfied with result.
but beside it, I saw something what has no function at my blog: after I left comment, I got link “change your information” (when I click on it nothing happened so it was not working in any case) and I want to delete this possibility from my blog. so, I found next php command/code in comment.php file and I would like to ask should I delete all of this below or only one line? I must ask, to avoid to damage my blog comment functionality:)

<?php } else if($comment_author) {
echo ('<span style="" id="showinfo">(<a href="javascript: ShowUtils();">change your information</a>)</span>');
echo'<span id="hideinfo" style="display: none">(<a href="javascript: HideUtils();">Close</a>)</span>';
echo '<div id="authorinfo" style="display: none">';
 ?>