Remove deprecated transports

lib/chess_web/channels/user_socket.ex

@@ -6,10 +6,6 @@ defmodule ChessWeb.UserSocket do
   ## Channels
   channel "game:*", ChessWeb.GameChannel
 
-  ## Transports
-  transport :websocket, Phoenix.Transports.WebSocket
-  # transport :longpoll, Phoenix.Transports.LongPoll
-
   # Socket params are passed from the client and can
   # be used to verify and authenticate a user. After
   # verification, you can put default assigns into

lib/chess_web/endpoint.ex

@@ -5,7 +5,8 @@ defmodule ChessWeb.Endpoint do
     plug Phoenix.Ecto.SQL.Sandbox
   end
 
-  socket "/socket", ChessWeb.UserSocket
+  socket "/socket", ChessWeb.UserSocket,
+    websocket: true
 
   # Serve at "/" the static files from "priv/static" directory.
   #