Do we need `as_tibble()` to drop the class?

[dajmcdon]

epiprocess/R/methods-epi_df.R

Line 11 in 7fd2119

as_tibble.epi_df <- function(x, ...) {

• This makes epipredict internals painful. I can see that someone may want this behaviour, but it means any time someone calls a function (from another package) that anywhere uses as_tibble(), it drops the class.