How to edit the text on the subscription signup form

On the subscription page where a user selects their subscription, there is some default text put in by your program

“Select a Subscription – We have the following subscriptions available for our site. To join, simply click on the Sign Up button and then complete the registration details.”

I’d like to edit or remove it (as we only have one subscription and it doesn’t make sense). Where/how can I do this? Thanks!