How can I remove fields in registration page?

[9tontruck]

Hi,

I tried to find similar questions but only questions I could find is about adding fields.

I am trying to remove "username" and "display name" and let users login with their email address. If I can't not remove "username", I want to remove "display name" at least. Would you give me some tips for doing it please?

Thanks,

[alexweissman]

Any luck yet? The process should essentially be the same as for adding fields, just done in reverse.