Update app.py

app.py

@@ -322,6 +322,8 @@ def start_training(
                 shell=True,
                 check=True
             )
+            shutil.rmtree(os.path.join(toolkit_src, ".git"), ignore_errors=True)
+            shutil.rmtree(os.path.join(toolkit_src, ".gitmodules"), ignore_errors=True)
 
         upload_folder(
             folder_path=dataset_folder,