[accounts][migrations] clean up unused migration

This migration was used to shift registered users to the new supervision
ecosystem.

Fixes #569

beat/web/accounts/migrations/0011_check_all_accounts.py

@@ -27,73 +27,19 @@
 
 from __future__ import unicode_literals
 
-import datetime
-from urllib.parse import urlparse
-
-from django.conf import settings
-from django.contrib.auth.models import User
 from django.db import migrations
-from django.template import loader
-
-
-def set_profile_state(apps, schema_editor):
-    """Set profile status"""
-
-    users = User.objects.all()
-    now = datetime.datetime.now()
-    expiration_date_delta = datetime.timedelta(
-        days=settings.ACCOUNT_BLOCKAGE_AFTER_FIRST_REJECTION_DAYS
-    )
-
-    specialusers = ["AnonymousUser", "plot", "system", "scheduler"]
-    for user in users:
-        user.save()
-        if user.is_staff or user.username in specialusers:
-            user.profile.status = "A"
-            user.profile.rejection_date = None
-        else:
-            # reject this account and inform by email the user
-            user.profile.status = "R"
-            user.profile.rejection_date = now + expiration_date_delta
-            from django.core.mail import send_mail
-
-            parsed_url = urlparse(settings.URL_PREFIX)
-            server_address = "%s://%s" % (parsed_url.scheme, parsed_url.hostname)
-
-            context = {
-                "user": user,
-                "prefix": server_address,
-            }
-
-            subject_template = loader.get_template(
-                "registration/mail.migration_10_accounts.subject.txt"
-            )
-            subject = subject_template.render(context)
 
-            # Note: e-mail subject *must not* contain newlines
-            subject = settings.EMAIL_SUBJECT_PREFIX + "".join(subject.splitlines())
 
-            message_template = loader.get_template(
-                "registration/mail.migration_10_accounts.message.txt"
-            )
-            message = message_template.render(context)
-
-            send_mail(subject, message, settings.DEFAULT_FROM_EMAIL, [user.email])
-
-        user.profile.supervision_key = None
-
-        user.profile.save()
-        user.save()
-
-
-def backward_dummy(apps, schema_editor):
-    pass
+class Migration(migrations.Migration):
 
+    """ This migration was initially used to help setup registered users with
+        on the new supervision ecosystem.
+        Current registered users were warned by email that they would need to have a valid
+        supervisor in order to continue using the platform.
 
-class Migration(migrations.Migration):
+        This migration has been cleaned up as it is no more used by the system.
+    """
 
     dependencies = [
         ("accounts", "0010_rename_godfather_to_supervisor"),
     ]
-
-    operations = [migrations.RunPython(set_profile_state, backward_dummy)]