Update imports in sopds_web_backend_view

sopds_web_backend/views.py

 from random import randint
-import urllib
 
 from django.shortcuts import render, redirect
 from django.template.context_processors import csrf
@@ -10,11 +9,9 @@ from django.contrib.auth.decorators import user_passes_test
 from django.core.urlresolvers import reverse, reverse_lazy
 
 from opds_catalog import models
-from opds_catalog.models import Book, Author, Series, bookshelf, Counter, Catalog, Genre
-#from opds_catalog.settings import MAXITEMS, DOUBLES_HIDE, AUTH, VERSION, ALPHABET_MENU, SPLITITEMS, FB2TOEPUB, FB2TOMOBI
+from opds_catalog.models import Book, Author, Series, bookshelf, Counter, Catalog, Genre, lang_menu
 from opds_catalog import settings
 from constance import config
-from opds_catalog.models import lang_menu
 from opds_catalog.opds_paginator import Paginator as OPDS_Paginator
 
 from sopds_web_backend.settings import HALF_PAGES_LINKS