update to phoenix 1.6

lib/cannery_web/endpoint.ex

@@ -7,13 +7,9 @@ defmodule CanneryWeb.Endpoint do
   @session_options [
     store: :cookie,
     key: "_cannery_key",
-    signing_salt: "fxAnJltS"
+    signing_salt: "N8eMKwCG"
   ]
 
-  socket "/socket", CanneryWeb.UserSocket,
-    websocket: true,
-    longpoll: false
-
   socket "/live", Phoenix.LiveView.Socket, websocket: [connect_info: [session: @session_options]]
 
   # Serve at "/" the static files from "priv/static" directory.