remove subscription

Main/models/__init__.py

@@ -2,7 +2,6 @@ from Main.models.userinfo import UserInfo
 from Main.models.group import Group
 from Main.models.task import Task
 from Main.models.set import Set
-from Main.models.subscription import Subscription
 from Main.models.settask import SetTask
 from Main.models.solution import Solution
 from Main.models.extrafile import ExtraFile

Main/models/subscription.py

@@ -1,12 +0,0 @@
-from django.db import models
-from django.contrib.auth.models import User
-
-from Main.models.group import Group
-
-
-class Subscription(models.Model):
-    group = models.ForeignKey(
-        Group, on_delete=models.CASCADE, related_name="subscriptions"
-    )
-    user = models.ForeignKey(User, on_delete=models.CASCADE)
-    role = models.IntegerField()