Clean up (unused imports, PEP8, etc)

apps/documents/utils.py

@@ -2,6 +2,7 @@ import os
 
 from common.conf.settings import TEMPORARY_DIRECTORY
 
+
 def document_save_to_temp_dir(document, filename, buffer_size=1024 * 1024):
     temporary_path = os.path.join(TEMPORARY_DIRECTORY, filename)
     return document.save_to_file(temporary_path, buffer_size)