fix: presentaiton

presentation/presentation.md

@@ -141,16 +141,4 @@ end
 
 --- 
 
-## Interface
-
-```elixir
-receive do
-  {:start_game, paticipants} -> {:new_game, game, game_state}
-  {:make_move, game, participant, move} -> {:update_game, game, game_state} or {:game_finished, game}
-  {:get_game_state, game} -> {:game_state, game, game_state}
-end
-```
-
----
-
 #### Questions?