cleanup code

billard/views.py

@@ -6,7 +6,6 @@ from billard.tasks import process_location_data
 from rest_framework import viewsets
 from django.shortcuts import render, redirect
 from django.views import generic
-from django.views.generic.detail import DetailView
 from django.contrib.auth.decorators import login_required, permission_required
 from django.db.models import Min, Sum
 from django.http import HttpResponse