delete login link

I want to solve a problem: how can I disable, ie do not make it appear, "posting comment as a guest. Sign up or login to your account. " In the items comments form?
thank you

This section can only be seen by users with a valid subscription.
If you have a valid subscription, please login now

Support is

It is currently off working hours and most of us aren't around.

Rest assured that we will get back to your issues as soon as the day starts tomorrow!

Your time
Stack Ideas time