Comments closed, editing comments.php

Trying to remove the Comments Closed box at the bottom of posts and I’ve tracked down the relevant part in Comments.php but not sure which part to edit. The first part is obviously the standard comments section and I’m pretty sure the next is Comments Closed. Any idea how I ditch this:

[Code moderated as per the Forum Rules. Please use the pastebin or post small cpde snippets between backticks.]