Remove banish_broken management command.

The bug it addresses is long fixed, and it's buggy.

(imported from commit b198a30f56f950168e3662dcea2bab7d908631f9)

zephyr/management/commands/banish_broken.py

@@ -1,25 +0,0 @@
-from optparse import make_option
-from django.core.management.base import BaseCommand
-
-from zephyr.models import Realm, UserProfile
-
-# Helper to be used with manage.py shell to get rid of bad users on prod.
-def banish_busted_users(change=False):
-    for u in UserProfile.objects.select_related().all():
-        if (u.is_active or u.realm.domain != "mit.edu"):
-            continue
-        (banished_realm, _) = Realm.objects.get_or_create(domain="mit.deleted")
-        if "|mit.edu@mit.edu" in u.email.lower():
-            print u.email
-            if change:
-                u.realm = banished_realm
-                u.email = u.email.split("@")[0] + "@" + banished_realm.domain
-                u.user.save()
-                u.save()
-
-class Command(BaseCommand):
-    option_list = BaseCommand.option_list + (
-        make_option('--dry-run', '-n', dest='dry_run', default=False, action='store_true'),)
-
-    def handle(self, *args, **options):
-        banish_busted_users(change=not options['dry_run'])