[PyTorch] Remove device transfers from JNI (#105583)
Summary:
If a model was exported for Vulkan backend without (automatic or manual) device transfers, then the export is incorrect, and the JNI need not correct that.
(If this assumption is incorrect, please give feedback.)
Undo the changes from
- D23763771: automatic device transfers in JNI
- D39519168: `"requires_backend_transfers"` logic in JNI
Test Plan: Verify CUNET+ hybrid model from D47488843 works.
Reviewed By: SS-JIA
Differential Revision: D47527244
Pull Request resolved: https://github.com/pytorch/pytorch/pull/105583
Approved by: https://github.com/SS-JIA
