pytorch

88c298c2 - Fix symbolic shape function for `flatten` (silvasean's) (#71762)

Fix symbolic shape function for `flatten` (silvasean's) (#71762) Summary: in response to https://github.com/pytorch/pytorch/pull/71727 Pull Request resolved: https://github.com/pytorch/pytorch/pull/71762 Reviewed By: anjali411 Differential Revision: D33771227 Pulled By: makslevental fbshipit-source-id: 7a46d200665d51c95978153f0638f35cdc7c3742 (cherry picked from commit eb3f404093010a62977c4559d4a931093a991ccc)