What he said. Then delete all your public ones.
Discussion
Wouldn't you lose your posts if you removed all the others?
I don't think so. If you go to nostr.wine they have a read me page that explains how they aggregate a bunch of public relays. I really enjoy using their relay.

Nope, they broadcast to and receive from a bunch of public relays. This gives reach and diacoverabliity. The global feed is once again useable.
I also publish to my own relay for backup purposes.
Yes, realise that now, thanks. I’ve signed up and have a personal backup also, 2 relays! Great service