Jamba: fix left-padding test (#30389)

fix test

tests/models/jamba/test_modeling_jamba.py

@@ -483,7 +483,7 @@ class JambaModelTest(ModelTesterMixin, GenerationTesterMixin, PipelineTesterMixi
             return model_kwargs
 
         for model_class in decoder_only_classes:
-            config, input_ids, attention_mask, _ = self._get_input_ids_and_config()
+            config, input_ids, attention_mask = self._get_input_ids_and_config()
             model = model_class(config).to(torch_device).eval()
             signature = inspect.signature(model.forward).parameters.keys()