Remove cuda init patch (#39222)
Summary:
The below lines have been removed from `torch/cuda/__init__.py` anyway:
```
_cudart = _load_cudart()
_cudart.cudaGetErrorName.restype = ctypes.c_char_p
_cudart.cudaGetErrorString.restype = ctypes.c_char_p
```
Pull Request resolved: https://github.com/pytorch/pytorch/pull/39222
Differential Revision: D21864397
Pulled By: yns88
fbshipit-source-id: 941b13f92192f930e1dfa4b385e1aec2e321e75f
