In EE 2.9.1 is there a way to removed default fields from the registration page? I see that I can create fields that add to the registration page, but I don't see a way to remove default fields. Surely someone other myself has had this thought before. Any help is appreciated. Thank you.
There are are a number of options open to you:
Edit the default member registration template in Design->Templates->Themes->Member Profile Templates
Use an add-on like Freemember
Create your own custom registration form