Revert "Fix non-matching defaults in docs (#5446) (#5451)"

This reverts commit b26df2a008.

plugins/modules/cloud/univention/udm_dns_zone.py

@@ -43,13 +43,11 @@ options:
     nameserver:
         type: list
         elements: str
-        default: []
         description:
             - List of appropriate name servers. Required if I(state=present).
     interfaces:
         type: list
         elements: str
-        default: []
         description:
             - List of interface IP addresses, on which the server should
               response this zone. Required if I(state=present).

plugins/modules/cloud/univention/udm_group.py

@@ -45,13 +45,11 @@ options:
             - define the whole ldap position of the group, e.g.
               C(cn=g123m-1A,cn=classes,cn=schueler,cn=groups,ou=schule,dc=example,dc=com).
         type: str
-        default: ''
     ou:
         required: false
         description:
             - LDAP OU, e.g. school for LDAP OU C(ou=school,dc=example,dc=com).
         type: str
-        default: ''
     subpath:
         required: false
         description:

plugins/modules/cloud/univention/udm_user.py

@@ -169,7 +169,6 @@ options:
         description:
             - List of telephone numbers.
         type: list
-        default: []
     postcode:
         description:
             - Postal code of users business address.
@@ -201,13 +200,11 @@ options:
                join."
         aliases: [ sambaPrivileges ]
         type: list
-        default: []
     samba_user_workstations:
         description:
             - Allow the authentication only on this Microsoft Windows host.
         aliases: [ sambaUserWorkstations ]
         type: list
-        default: []
     sambahome:
         description:
             - Windows home path, e.g. C('\\$FQDN\$USERNAME').