email: Remove override for local addresses

- The default, which is to trust local LAN IPs is good enough for FreedomBox use
case.

- This allows skipping some checks like DKIM for mails originating from local
networks which are not expected to have proper signatures.

Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>

plinth/modules/email/data/etc/rspamd/override.d/freedombox-options.inc

@@ -1,6 +0,0 @@
-# The following section is managed by FreedomBox
-# Be careful not to edit
-
-# Do not trust 127.0.0.1
-local_addrs = [];
-local_networks = [];