Platforms: linux

This test was disabled because it is failing on master ([recent examples](http://torch-ci.com/failure/test_torch.py%3A%3ATestTorch%3A%3Atest_equal)).

The cause seems to point to https://github.com/pytorch/pytorch/pull/100024 (or D45282119 as it was landed internally)

cc @mruberry @houseroad @ezyang 
from copy import deepcopy
        l = torch.nn.Linear(10, 1)
        s = l.state_dict(keep_vars=True)
        self.assertEqual(torch.nn.Parameter, (s['weight']))
        self.assertEqual(torch.nn.Parameter, (s['bias']))
        s2 = deepcopy(s)
        self.assertEqual(torch.nn.Parameter, (s2['weight']))
        self.assertEqual(torch.nn.Parameter, (s2['bias']))
    def test_pickle(self):
        import pickle
        a = torch.randn(5, 5)
        serialized = pickle.dumps(a)
        b = pickle.loads(serialized)
        self.assertEqual(a, b)
    @skipIfTorchDynamo("TorchDynamo fails with unknown reason")
    def test_pickle_parameter(self):
        import pickle
        a = torch.nn.Parameter(torch.randn(5, 5))
        serialized = pickle.dumps(a)
        b = pickle.loads(serialized)
        self.assertTrue(isinstance(b, torch.nn.Parameter))
        self.assertEqual(a.requires_grad, b.requires_grad)
        self.assertEqual(a, b)
    @skipIfTorchDynamo("TorchDynamo fails with unknown reason")
    def test_pickle_parameter_no_requires_grad(self):