Don't pass args to Watcher

lib/elixir_koans.ex

@@ -8,7 +8,7 @@ defmodule ElixirKoans do
       worker(Display, []),
       worker(Tracker, []),
       worker(Runner, []),
-      worker(Watcher, [[]])
+      worker(Watcher, [])
     ]
 
     opts = [strategy: :one_for_one, name: ElixirKoans.Supervisor]

lib/watcher.ex

@@ -1,12 +1,12 @@
 defmodule Watcher do
   use GenServer
 
-  def start_link(args) do
-    GenServer.start_link(__MODULE__, args)
+  def start_link() do
+    GenServer.start_link(__MODULE__, [dirs: ["lib/koans"]])
   end
 
   def init(args) do
-    {:ok, watcher_pid} = FileSystem.start_link(dirs: ["lib/koans"])
+    {:ok, watcher_pid} = FileSystem.start_link(args)
     FileSystem.subscribe(watcher_pid)
     {:ok, %{watcher_pid: watcher_pid}}
   end