pylint: remove double import of Group class

combo/data/models.py

@@ -36,7 +36,6 @@ from django.utils.safestring import mark_safe
 from django.utils.text import slugify
 from django.utils.translation import ugettext_lazy as _
 from django.forms.widgets import MediaDefiningClass
-from django.contrib.auth.models import Group
 
 from ckeditor.fields import RichTextField
 import cmsplugin_blurp.utils