Fix flake8 error

recircle/image/views.py

 # from django.shortcuts import render
 from rest_framework.viewsets import ViewSet
 from rest_framework.response import Response
-from django.http import HttpResponse
 from django.shortcuts import get_object_or_404
 from rest_framework import status
 from django.core.exceptions import ObjectDoesNotExist
@@ -43,7 +42,6 @@ class ImageViewSet(ViewSet):
         serializer = ImageSerializer(instance=image)
         return Response(serializer.data)
 
-
     def update(self, request, pk=None):
         serializer = ImageUpdateSerializer(data=request.data)
         serializer.is_valid(raise_exception=True)