Remove redundant fallback for view_as_complex (#103261)
This enables lowering to work for it
Differential Revision: [D46585029](https://our.internmc.facebook.com/intern/diff/D46585029)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/103261
Approved by: https://github.com/desertfire, https://github.com/eellison
