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 
m1, t1 = Tracker.make()
        m2, t2 = Tracker.make()
        x = torch.empty(2, requires_grad=True)
        x._tracker = t1
        y = torch.empty(2, requires_grad=True)
        y._tracker = t2
        del t1
        del t2
        # this h
        x._backward_hooks = y
        y._backward_hooks = x
        del x
        with disable_gc():
            del y
            self.assertFalse(m1[0])
            self.assertFalse(m2[0])
        gc.collect()
        self.assertTrue(m1[0])
        self.assertTrue(m2[0])
    @skipIfTorchDynamo("https://github.com/pytorch/torchdynamo/issues/1993")
    def test_dead_weak_ref(self):
        x = torch.empty(2)
        w_x = weakref.ref(x)
        y = torch.empty(2)
        y.grad = x
        del x
        x = w_x()
        # Ideall
        # provid