Undo old logic

`None` values in the configuration are now checked before being saved

monkey/infection_monkey/config.py

@@ -27,8 +27,6 @@ class Configuration(object):
             if self._depth_from_commandline and key == "depth":
                 continue
             if hasattr(self, key):
-                if type(value) == list:
-                    value = list(filter(None, value))
                 setattr(self, key, value)
             else:
                 unknown_items.append(key)