Disable username, register and login only with email and password

[schtirlizzz]

Is there already such an option or what is a neat way to do this? There's no necessity to remove username completely, just disable it so it can be enabled later on.

Some steps I consider to be essential:

1. Make field username in the users table NULL DEFAULT NULL.
2. Remove username from the registration form and all associated validation.
3. Change user model so it ignores username.

[bartzushka]

need the same functionality... Does anyone have any solutions?