pytorch

ff78c732 - [ONNX] Remove f arg from export_to_pretty_string (#69045) (#69546)

[ONNX] Remove f arg from export_to_pretty_string (#69045) (#69546) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/69546 The arg is not used and was previously deprecated. Also remove torch.onnx._export_to_pretty_string. It's redundant with the public version. Test Plan: Imported from OSS Reviewed By: malfet Differential Revision: D32994270 Pulled By: msaroufim fbshipit-source-id: f8f3933b371a0d868d9247510bcd73c31a9d6fcc