Remove cache folder from image data folder (#1446)

Co-authored-by: regisss <15324346+regisss@users.noreply.github.com>

examples/stable-diffusion/training/README.md

@@ -273,6 +273,7 @@ Now let's get our dataset. For this example we will use some dog images: https:/
 Let's first download it locally:
 
 ```python
+import os
 from huggingface_hub import snapshot_download
 
 local_dir = "./dog"
@@ -281,6 +282,12 @@ snapshot_download(
     local_dir=local_dir, repo_type="dataset",
     ignore_patterns=".gitattributes",
 )
+
+# check if .cache folder exists and remove it.
+cache_folder = os.path.join(local_dir, ".cache")
+if os.path.exists(cache_folder):
+    import shutil
+    shutil.rmtree(cache_folder)
 ```
 
 ### Full model finetune