ddns-scripts: Remove not working ddns provider

I checked the hostname for existing DNS A and AAAA entries and these
ones didn't have an entry.

Signed-off-by: Gerald Hansen <gerald.hansen@cloud.ionos.com>

net/ddns-scripts/files/usr/share/ddns/list

@@ -7,7 +7,6 @@ afraid.org-v2-token
 all-inkl.com
 changeip.com
 core-networks.de
-ddns.com.br
 ddnss.de
 ddo.jp
 desec.io
@@ -31,7 +30,6 @@ dyndns.it
 dyndns.org
 dyndnss.net
 dynsip.org
-dyns.net
 dynu.com
 dynv6.com
 easydns.com
@@ -52,7 +50,6 @@ nettica.com
 no-ip.pl
 now-dns.com
 nsupdate.info
-nubem.com
 opendns.com
 oray.com
 ovh.com