imports organized

smash/web/views/export.py

 # coding=utf-8
 import csv
-import re
 from distutils.util import strtobool
 
 import django_excel as excel
 from django.http import HttpResponse
 from django.shortcuts import get_object_or_404
 
-from ..utils import get_client_ip
-from .notifications import get_today_midnight_date
 from web.decorators import PermissionDecorator
-from web.models import Subject, StudySubject, Appointment, ConfigurationItem, Study, Worker, Provenance, Visit
+from web.models import Subject, StudySubject, Appointment, ConfigurationItem, Study, Worker, Provenance
 from web.models.constants import VISIT_SHOW_VISIT_NUMBER_FROM_ZERO
 from web.models.custom_data import CustomStudySubjectField
 from web.models.custom_data.custom_study_subject_field import get_study_subject_field_id
-from web.templatetags.filters import display_visit_number
 from . import e500_error, wrap_response
 from .notifications import get_today_midnight_date
+from ..utils import get_client_ip
 
 
 @PermissionDecorator('export_subjects', 'subject')