Remove unused import in project template (#2466)

wagtail/project_template/project_name/urls.py

@@ -24,7 +24,6 @@ urlpatterns = [
 if settings.DEBUG:
     from django.conf.urls.static import static
     from django.contrib.staticfiles.urls import staticfiles_urlpatterns
-    from django.views.generic import TemplateView
 
     # Serve static and media files from development server
     urlpatterns += staticfiles_urlpatterns()