do not ask about `check_rhub()` in `release()` because it is deprecated and defunct

[MLopez-Ibanez]

Is your feature request related to a problem? Please describe.

I'm always frustrated when devtools::release() asks:

Have you checked on R-hub (with `check_rhub()`)?

However, devtools::check_rhub() says:

This function is deprecated and defunct since rhub v2.
Please see `?rhubv2` on transitioning to the new rhub functions.
NULL

Describe the solution you'd like

Don't ask about check_rhub().

Describe alternatives you've considered

Ignoring the question and lying in the reply.

[renatocava]

Same problem

[jennybc]

Related to #2500, which is to deprecate release(), because it's got various outdated bits in it (and is missing some more modern bits).

[jennybc]

Fixed in a7bb903