Fix F811 flake8 warning (x1).

transformers/tests/modeling_xlnet_test.py

@@ -402,24 +402,6 @@ class XLNetModelTest(CommonTestCases.CommonModelTester):
                 [[self.seq_length, self.batch_size, self.hidden_size]] * self.num_hidden_layers,
             )
 
-        def prepare_config_and_inputs_for_common(self):
-            config_and_inputs = self.prepare_config_and_inputs()
-            (
-                config,
-                input_ids_1,
-                input_ids_2,
-                input_ids_q,
-                perm_mask,
-                input_mask,
-                target_mapping,
-                segment_ids,
-                lm_labels,
-                sequence_labels,
-                is_impossible_labels,
-            ) = config_and_inputs
-            inputs_dict = {"input_ids": input_ids_1}
-            return config, inputs_dict
-
         def create_and_check_xlnet_sequence_classif(
             self,
             config,