Remove dead code found by the type system

    warning: incompatible types given to String.to_atom/1:

        String.to_atom(template)

    given types:

        dynamic(false or {term(), binary()})

    but expected one of:

        binary()

    where "template" was given the type:

        # type: dynamic(false or {term(), binary()})
        # from: lib/phoenix_live_view/router.ex:300:18
        template = Phoenix.LiveView.Utils.normalize_layout(template)

    typing violation found at:
    │
    301 │         Map.put(acc, :root_layout, {mod, String.to_atom(template)})
    │                                                 ~
    │
    └─ lib/phoenix_live_view/router.ex:301:49: Phoenix.LiveView.Router.validate_live_session_opts/3

Author: josevalim

lib/phoenix_live_view/router.ex

@@ -296,10 +296,6 @@ defmodule Phoenix.LiveView.Router do
         expected a map with string keys or an MFA tuple, got #{inspect(bad_session)}
         """
 
-      {:root_layout, {mod, template}}, acc when is_atom(mod) and is_binary(template) ->
-        template = Phoenix.LiveView.Utils.normalize_layout(template)
-        Map.put(acc, :root_layout, {mod, String.to_atom(template)})
-
       {:root_layout, {mod, template}}, acc when is_atom(mod) and is_atom(template) ->
         Map.put(acc, :root_layout, {mod, template})
 
@@ -313,10 +309,6 @@ defmodule Phoenix.LiveView.Router do
         expected a tuple with the view module and template atom name, got #{inspect(bad_layout)}
         """
 
-      {:layout, {mod, template}}, acc when is_atom(mod) and is_binary(template) ->
-        template = Phoenix.LiveView.Utils.normalize_layout(template)
-        Map.put(acc, :layout, {mod, template})
-
       {:layout, {mod, template}}, acc when is_atom(mod) and is_atom(template) ->
         Map.put(acc, :layout, {mod, template})