[mod] remove unused imports

ffdnispdb/crawler.py

@@ -3,7 +3,6 @@
 import io
 import cgi
 import sys
-import pytz
 from datetime import datetime, timedelta
 from werkzeug.http import parse_date
 from flask import escape, json, current_app
@@ -12,7 +11,6 @@ import requests
 from ispformat.validator import validate_isp
 from .models import ISP
 from .utils import check_geojson_spatialite, utcnow, filesize_fmt
-from . import db
 
 
 def get_encoding(content_type):