I would agree with you if we were talking about a CSS file, but we’re not.
Uh huh. You didn’t look did you?
It’s your WordPress theme that displays/ask for the author URL in the comment section.
If your theme uses the same form (it probably does unless the theme developer has lost their mind) the the class is the same as in Twenty Thirteen.
.comment-form-url {
display: none;
}
.fn {
display: none;
}
I just looked at a test Twenty Thirteen installation and the first one is for the form, the second one is for displaying the URL from posted comments.
It may be different on your theme. This Codex article may help.
https://codex.www.ads-software.com/Function_Reference/comment_form
And, I can’t see how this is a template issue.
Depends on the template. I didn’t bother to become a member for that theme club so I can’t/won’t look. If you can’t figure it out then try asking at the theme providers support page.
https://mythemeshop.com/support/
Even though it may not have cost you anything, that’s still a commercial product and we don’t support those here.