removed redundant arg in prepare_inputs (#6614)

* removed redundant arg in prepare_inputs

* made same change in prediction_loop

src/transformers/trainer.py

@@ -705,7 +705,7 @@ class Trainer:
             print(output)
 
     def _prepare_inputs(
-        self, inputs: Dict[str, Union[torch.Tensor, Any]], model: nn.Module
+        self, inputs: Dict[str, Union[torch.Tensor, Any]]
     ) -> Dict[str, Union[torch.Tensor, Any]]:
         """
         Prepare :obj:`inputs` before feeding them to the model, converting them to tensors if they are not already and
@@ -746,7 +746,7 @@ class Trainer:
             return self._training_step(model, inputs, self.optimizer)
 
         model.train()
-        inputs = self._prepare_inputs(inputs, model)
+        inputs = self._prepare_inputs(inputs)
 
         if self.args.fp16 and _use_native_amp:
             with autocast():
@@ -1071,7 +1071,7 @@ class Trainer:
         """
         has_labels = any(inputs.get(k) is not None for k in ["labels", "lm_labels", "masked_lm_labels"])
 
-        inputs = self._prepare_inputs(inputs, model)
+        inputs = self._prepare_inputs(inputs)
 
         with torch.no_grad():
             outputs = model(**inputs)