message: fix(robot-server): Do not raise exception when unpickling unknown types
diff: @@ -173,7 +173,6 @@ class LegacyUnpickler(Unpickler):
  known_type = False
  if not known_type:
  - raise NotImplementedError
  _log.warning(
  f'Unpickling unknown type "{name}" from module "{module}".'
  f" This may cause problems with reading records created by"
  