fix vad max_end_sil bug

hnluo

2023-09-06 602d3b5e2ec26c360648d585140d57b2ffecff5c

 funasr/models/frontend/abs_frontend.py

@@ -14,4 +14,4 @@
    def forward(
        self, input: torch.Tensor, input_lengths: torch.Tensor
    ) -> Tuple[torch.Tensor, torch.Tensor]:
        raise NotImplementedError
        raise NotImplementedError