Remove unused imports

Author: carljm

form_utils/widgets.py

@@ -5,14 +5,11 @@
  - thanks baumer1122
 
 """
-import os
 import posixpath
 
 from django import forms
 from django.conf import settings
-from django.utils.functional import curry
 from django.utils.safestring import mark_safe
-from django.core.files.uploadedfile import SimpleUploadedFile as UploadedFile
 
 from form_utils.settings import JQUERY_URL, FORM_UTILS_MEDIA_URL