with and without www

I have just created my first wordpress page holding page at https://www.ringmasterentertainment.com but the front page that was created when I first installed wordpress is still coming up at ringmasterentertainment.com, which I don’t want.

I have gone into settings/general and changed the wordpress address and the site address to https://www.ringmasterentertainment.com.

How do I get rid of the page that doesn’t have the “www” prefix?

Thanks.