Remove or comment existing implementations

Author: sabiwara

lib/elixir/lib/dynamic_supervisor.ex

@@ -1136,15 +1136,6 @@ defmodule DynamicSupervisor do
     ]
   end
 
-  @impl true
-  def format_status(:terminate, [_pdict, state]) do
-    state
-  end
-
-  def format_status(_, [_pdict, %{mod: mod} = state]) do
-    [data: [{~c"State", state}], supervisor: [{~c"Callback", mod}]]
-  end
-
   ## Helpers
 
   @compile {:inline, call: 2}

lib/elixir/lib/gen_event.ex

@@ -507,6 +507,8 @@ defmodule GenEvent do
     {:ok, states, [name, handlers, hib]}
   end
 
+  # Keeping deprecated format_status/2 since the current implementation is not
+  # compatible with format_status/1 and GenEvent is deprecated anyway
   @doc false
   def format_status(opt, status_data) do
     [pdict, sys_state, parent, _debug, [name, handlers, _hib]] = status_data