management: Delete turn_off_digests command.

This command was part of early prototyping of the digests feature, and
in particular its purpose is better served via the organization-level
setting to control digest emails for the organization.

Fixes part of #18898.

zerver/management/commands/turn_off_digests.py

@@ -1,34 +0,0 @@
-from django.core.management.base import CommandParser
-
-from zerver.lib.actions import do_change_notification_settings
-from zerver.lib.management import ZulipBaseCommand
-
-
-class Command(ZulipBaseCommand):
-    help = """Turn off digests for a subdomain/string_id or specified set of email addresses."""
-
-    def add_arguments(self, parser: CommandParser) -> None:
-        self.add_realm_args(parser)
-
-        self.add_user_list_args(
-            parser,
-            help="Turn off digests for this comma-separated list of email addresses.",
-            all_users_help="Turn off digests for everyone in realm.",
-        )
-
-    def handle(self, **options: str) -> None:
-        realm = self.get_realm(options)
-        user_profiles = self.get_users(options, realm)
-
-        print("Turned off digest emails for:")
-        for user_profile in user_profiles:
-            already_disabled_prefix = ""
-            if user_profile.enable_digest_emails:
-                do_change_notification_settings(
-                    user_profile, "enable_digest_emails", False, acting_user=None
-                )
-            else:
-                already_disabled_prefix = "(already off) "
-            print(
-                f"{already_disabled_prefix}{user_profile.full_name} <{user_profile.delivery_email}>"
-            )