💚 Fix linters

apps/permission/models.py

@@ -5,7 +5,6 @@ import functools
 import json
 import operator
 from copy import copy
-from time import sleep
 
 from django.contrib.contenttypes.models import ContentType
 from django.core.exceptions import ValidationError

apps/permission/tables.py

@@ -4,7 +4,6 @@
 import django_tables2 as tables
 from django.urls import reverse_lazy
 from django.utils.html import format_html
-
 from member.models import Membership
 from note_kfet.middlewares import get_current_authenticated_user
 from permission.backends import PermissionBackend