Revert "[export] Turn on install_free_tensors flag (#164691)"

This reverts commit 220a34118f40fab4f3f517556d6e1434139a1590.

test/dynamo/test_aot_autograd.py

@@ -816,6 +816,9 @@ class AotAutogradFallbackTests(torch._inductor.test_case.TestCase):
         opt_fn = torch.compile(fn, backend="aot_eager")
         self.assertTrue(torch._dynamo.testing.same(fn(x), opt_fn(x)))
 
+    @unittest.skip(
+        "Unstable test because of https://github.com/pytorch/pytorch/pull/164691"
+    )
     def test_aot_sequence_nr(self):
         class Model(torch.nn.Module):
             def __init__(self) -> None: