module 'open3d.cuda.pybind.geometry' has no attribute 'crop_triangle_mesh'

### Checklist

- [X] I have searched for [similar issues](https://github.com/isl-org/Open3D/issues).
- [X] For Python issues, I have tested with the [latest development wheel](http://www.open3d.org/docs/latest/getting_started.html#development-version-pip).
- [X] I have checked the [release documentation](http://www.open3d.org/docs/release/) and the [latest documentation](http://www.open3d.org/docs/latest/) (for `master` branch).

### My Question

When I want to crop mesh by open3d, I find the function "open3d.geometry.crop_triangle_mesh" in the document. But when I use this fucntion, output show "module 'open3d.cuda.pybind.geometry' has no attribute 'crop_triangle_mesh'".