Hi there,
Oh, if that so, you are required to do modifications on this path
.../components/com_komento/themes/wireframe/form/default.php and remove codes below at lines 50.
[gist type="php"]
<?php if ($allowRegistration) { ?>
<?php echo JText::sprintf('COM_KOMENT_LOGIN_LINK', KT::login()->getRegistrationLink(), KT::login()->getLoginLink());?>
<?php } ?>
<?php } else { ?>
[/gist]
In order for you to be able to use this on the future, you are required to do template override
https://stackideas.com/docs/komento/administrators/customization/theme-overriding on above file as those change you made will be overwritten on your next update/upgrade.
Please give it a try and see how it goes