Removed deprecated methods

Data/Scripts/002_Save data/004_Game_SaveValues.rb

@@ -9,15 +9,6 @@ SaveData.register(:player) do
   new_game_value { Player.new("Unnamed", GameData::TrainerType.keys.first) }
 end
 
-# @deprecated This save data is slated to be removed in v22, as its use is
-# replaced by $stats.play_time.
-SaveData.register(:frame_count) do
-  ensure_class :Integer
-  save_value { Graphics.frame_count }
-  load_value { |value| Graphics.frame_count = value }
-  new_game_value { 0 }
-end
-
 SaveData.register(:game_system) do
   load_in_bootup
   ensure_class :Game_System