corrected an improper import and removed some flakes

- Legacy-Id: 10582

ietf/nomcom/factories.py

@@ -1,9 +1,6 @@
 import factory
 import random
 
-from django.core.files.storage import FileSystemStorage
-from django.conf import settings
-
 from ietf.nomcom.models import NomCom, Position, Feedback, Nominee, NomineePosition
 from ietf.group.factories import GroupFactory
 from ietf.person.factories import PersonFactory

ietf/settings_sqlitetest.py

@@ -5,7 +5,7 @@
 #   ./manage.py test --settings=settings_sqlitetest doc.ChangeStateTestCase
 #
 
-import io
+import os 
 from settings import *                  # pyflakes:ignore
 
 # Workaround to avoid spending minutes stepping through the migrations in