axe_data does not remove pre$mold$extras

The axe_data.workflow() function does not remove the mold$extras like it does for outcomes and predictors. If a column of data is set to be another role, the model will retain all of that data. Would it be OK to also remove pre$mold$extras or was it intentionally retained for predictions?

The 'outcomes' and 'predictors' are removed here.

axe_data.workflow <- function(x, verbose = FALSE, ...) {
  fit <- extract_fit_parsnip(x)
  fit <- butcher::axe_data(fit, verbose = verbose, ...)
  x <- replace_workflow_fit(x, fit)

  x <- replace_workflow_outcomes(x, NULL)
  x <- replace_workflow_predictors(x, NULL)

  add_butcher_class(x)
}

Start with the axe_data.workflow() entry point shown in the issue and compare its handling of outcomes and predictors with pre$mold$extras. Determine whether retaining extras is required for predictions; done means the intended retention behavior is established and the workflow consistently removes or preserves the data accordingly.