Removing the “nocomments” text

I’ve just set up a new blog where I don’t need comments. I have successfuly tweaked the files to remove most references to comments however, on remains and I cannot find the file to edit.

When I click through to a full post (eg https://www.mydomain.com/?p=7) I see the “Comments are closed.” note at the bottom of the page. If I look at the source I can clearly see:

<!-- You can start editing here. -->
  <div class="post-content">
  <p>
        <span class="trackbackr"><a href="https://www.grafixwire.info/wp-trackback.php?p=7">Trackback <acronym title="Uniform Resource Identifier">URI</acronym></a></span> |
          </p>
</div>
<!-- If comments are closed. -->
<p class="nocomments">Comments are closed.</p>

    <div class="navigation">
    <div class="alignleft">
      &larr; <a href="https://www.grafixwire.info/?p=6">MapleJet debuts Xaar-enabled ProDigit printers at Interpack</a>    </div>

I have searched all the obvious places and cannot find the original file where I can edit this. Can anyone throw some light on the issue?

Any assistance much welcomed.

Giles