Remove "keys and values" example

lib/koans/05_maps.ex

@@ -13,11 +13,6 @@ defmodule Maps do
                         age: 27 }
   end
 
-  koan "A map has keys and values" do
-    assert Enum.sort(Map.keys(@person)) == ___
-    assert Enum.sort(Map.values(@person)) == ___
-  end
-
   koan "Fetching a value returns a tuple with ok when it exists" do
     assert Map.fetch(@person, :age) == ___
   end

test/koans/maps_koans_test.exs

@@ -5,7 +5,6 @@ defmodule MapsTests do
   test "Maps" do
     answers = [
       "Jon",
-      {:multiple, [[:age, :last_name, :name], [27, "Jon", "Snow"]]},
       {:ok, 27},
       :error,
       {:ok, "Kayaking"},