[fbsync] remove unused import (#6473)

Reviewed By: datumbox

Differential Revision: D39013681

fbshipit-source-id: 489e6d3403d95b1fa62109a208886b36a47f4fe6

Author: NicolasHug

torchvision/prototype/transforms/_augment.py

@@ -3,7 +3,6 @@
 import warnings
 from typing import Any, Dict, Tuple
 
-import PIL.Image
 import torch
 from torchvision.prototype import features
 from torchvision.prototype.transforms import functional as F