Don't nuke DataBoards when threads.json 404s, as 4chan fucks up often.

src/General/DataBoard.coffee

@@ -70,10 +70,7 @@ class DataBoard
     @save()
   ajaxClean: (boardID) ->
     $.cache "//api.4chan.org/#{boardID}/threads.json", (e) =>
-      if e.target.status is 404
-        # Deleted board.
-        @delete boardID
-      else if e.target.status is 200
+      return if e.target.status isnt 200
       board   = @data.boards[boardID]
       threads = {}
       for page in JSON.parse e.target.response