rm unnecessary import
@@ -12,7 +12,6 @@ from django.core.cache.utils import make_template_fragment_key
from django.core.validators import MaxValueValidator
from django.core.exceptions import ValidationError
from django.core.urlresolvers import reverse_lazy
-from django.core.validators import MinValueValidator
from django.db import models
from django.utils.translation import ugettext_lazy as _
from django_countries.fields import CountryField
