Update forward signature test for vision models (#27681)

* Update forward signature

* Empty-Commit

tests/models/nat/test_modeling_nat.py

@@ -15,7 +15,6 @@
 """ Testing suite for the PyTorch Nat model. """
 
 import collections
-import inspect
 import unittest
 
 from transformers import NatConfig
@@ -261,18 +260,6 @@ class NatModelTest(ModelTesterMixin, PipelineTesterMixin, unittest.TestCase):
             x = model.get_output_embeddings()
             self.assertTrue(x is None or isinstance(x, nn.Linear))
 
-    def test_forward_signature(self):
-        config, _ = self.model_tester.prepare_config_and_inputs_for_common()
-
-        for model_class in self.all_model_classes:
-            model = model_class(config)
-            signature = inspect.signature(model.forward)
-            # signature.parameters is an OrderedDict => so arg_names order is deterministic
-            arg_names = [*signature.parameters.keys()]
-
-            expected_arg_names = ["pixel_values"]
-            self.assertListEqual(arg_names[:1], expected_arg_names)
-
     def test_attention_outputs(self):
         self.skipTest("Nat's attention operation is handled entirely by NATTEN.")