Remove unused watcher memo

app/SystemEnv.scala

@@ -166,9 +166,6 @@ final class SystemEnv(application: Application) {
     o.threadsAllowedToBlockForConnectionMultiplier = config getInt "mongo.threadsAllowedToBlockForConnectionMultiplier"
   }
 
-  lazy val watcherMemo = new WatcherMemo(
-    timeout = getMilliseconds("memo.watcher.timeout"))
-
   lazy val hookMemo = new HookMemo(
     timeout = getMilliseconds("memo.hook.timeout"))
 

app/game/Socket.scala

@@ -104,5 +104,4 @@ final class Socket(
       JsObject(Seq("error" -> JsString("Invalid request")))
     ) andThen Enumerator.enumInput(Input.EOF))
   }
-
 }

app/memo/WatcherMemo.scala

@@ -1,7 +0,0 @@
-package lila
-package memo
-
-final class WatcherMemo(timeout: Int) extends BooleanExpiryMemo(timeout) {
-
-  def count(prefix: String): Int = keys count (_ startsWith prefix)
-}

todo

@@ -1,2 +1 @@
 ping nbm
-compress player.ps notation