management: Delete fix_unreads command.

This command was part of the complex migration to introduce the
`unread_msgs` data structure as the source of truth for unreads.
Effectively, it's a migration to remove anomalies that we ran several
times before turning it into the final 0104_fix_unreads.py migration.

Fixes part of #18898.

zerver/management/commands/fix_unreads.py

@@ -1,57 +0,0 @@
-import logging
-from argparse import ArgumentParser
-from typing import Any, List, Optional
-
-from django.db import connection
-
-from zerver.lib.fix_unreads import fix
-from zerver.lib.management import CommandError, ZulipBaseCommand
-from zerver.models import Realm, UserProfile
-
-logging.getLogger("zulip.fix_unreads").setLevel(logging.INFO)
-
-
-class Command(ZulipBaseCommand):
-    help = """Fix problems related to unread counts."""
-
-    def add_arguments(self, parser: ArgumentParser) -> None:
-        parser.add_argument(
-            "emails", metavar="<emails>", nargs="*", help="email address to spelunk"
-        )
-        parser.add_argument("--all", action="store_true", help="fix all users in specified realm")
-        self.add_realm_args(parser)
-
-    def fix_all_users(self, realm: Realm) -> None:
-        user_profiles = list(
-            UserProfile.objects.filter(
-                realm=realm,
-                is_bot=False,
-            )
-        )
-        for user_profile in user_profiles:
-            fix(user_profile)
-            connection.commit()
-
-    def fix_emails(self, realm: Optional[Realm], emails: List[str]) -> None:
-
-        for email in emails:
-            try:
-                user_profile = self.get_user(email, realm)
-            except CommandError:
-                print(f"e-mail {email} doesn't exist in the realm {realm}, skipping")
-                return
-
-            fix(user_profile)
-            connection.commit()
-
-    def handle(self, *args: Any, **options: Any) -> None:
-        realm = self.get_realm(options)
-
-        if options["all"]:
-            if realm is None:
-                raise CommandError("You must specify a realm if you choose the --all option.")
-
-            self.fix_all_users(realm)
-            return
-
-        self.fix_emails(realm, options["emails"])