refactor(types): remove dead catch-all clauses unreachable per success typing

lib/mv_web/live/join_live.ex

@@ -287,8 +287,6 @@ defmodule MvWeb.JoinLive do
     end
   end
 
-  defp member_field_input_type(_), do: "text"
-
   defp member_field_atom(field_id) when is_binary(field_id) do
     Mv.Constants.member_fields()
     |> Enum.find(&(Atom.to_string(&1) == field_id))