itn on iOS is not supported for the time being (#969)

andyweiqiu

2023-09-21 b8909ab5b94e293605a9e04f42874e0320773a49

 funasr/models/encoder/abs_encoder.py

@@ -18,4 +18,4 @@
        ilens: torch.Tensor,
        prev_states: torch.Tensor = None,
    ) -> Tuple[torch.Tensor, torch.Tensor, Optional[torch.Tensor]]:
        raise NotImplementedError
        raise NotImplementedError