ETCI2021: remove unneeded/untested code (#191)

* ETCI2021: remove unneeded/untested code

* Remove unneeded import

torchgeo/datasets/etci2021.py

@@ -5,7 +5,6 @@
 
 import glob
 import os
-import shutil
 from typing import Callable, Dict, List, Optional
 
 import numpy as np
@@ -251,6 +250,3 @@ class ETCI2021(VisionDataset):
             filename=self.metadata[self.split]["filename"],
             md5=self.metadata[self.split]["md5"] if self.checksum else None,
         )
-
-        if os.path.exists(os.path.join(self.root, "__MACOSX")):
-            shutil.rmtree(os.path.join(self.root, "__MACOSX"))