Cannot import name 'stack_samples' from torchgeo.datasets

[KennSmithDS]

Description of issue
When trying to go through the Getting Started tutorial, I get an ImportError on stack_samples in the first cell.

---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
/tmp/ipykernel_51260/1420171020.py in <module>
      4 from torch.utils.data import DataLoader
      5 
----> 6 from torchgeo.datasets import NAIP, ChesapeakeDE, **stack_samples**
      7 from torchgeo.datasets.utils import download_url
      8 from torchgeo.samplers import RandomGeoSampler

ImportError: cannot import name 'stack_samples' from 'torchgeo.datasets' (/home/ying/anaconda3/envs/torch/lib/python3.9/site-packages/torchgeo/datasets/__init__.py)

Steps to reproduce
Clean torchgeo install from conda install torchgeo via conda-forge channel

[calebrob6]

See #274