Remove arg calls if appropriate

[avahoffman]

data %>%
  summarize(across(
    .cols = {vector or tidyselect},
    .fns = {some function},
    {additional arguments}
  ))

I'm thinking the .cols and .fns could be removed from things that look like above

[clifmckee]

Also need to make sure that we are using anonymous functions in our examples where additional arguments are needed. There are a few places where some error messages about deprecated code are still showing up.