Possible Unused Class: "dl_links"

The content.css stylesheet contains the following rules for a .dl_links class,

.action-bar div.dl_links {

	padding: 10px 0 0 10px;

}

div.dl_links {

	display: inline-block;

	text-transform: none;

}

.dl_links strong {

	font-weight: bold;

}

.dl_links ul {

	list-style-type: none;

	margin: 0;

	display: inline-block;

}

.dl_links li {

	display: inline-block;

}

I have tried searching phpBB packages ranging from 3.3.11 right back to 3.0.12 and I can't find any dl_links in the templates, the only reference to it is the content.css stylesheet.

Can this be removed? or is it used and I'm missing it? I did think it could be the export option in the PM folder but I have checked there and that's not it.