removed Open-Xchange mentions

playbooks/linux/ubuntu-server/nextcloud_full_deployment/README.txt

@@ -2,7 +2,6 @@
 
 This is a full-stack Nextcloud deployment combined with hardening, a Collabora CODE server for
 in-browser document editing, and a Nextcloud Talk High-Performance Backend (HPB) for group calls.
-An Open-Xchange mail connector is also planned (see "Playbooks" below for its current status).
 
 The minimum setup of this deployment would be a single server (this context wasn't tested yet).
 The optimal setup uses one server per role:
@@ -90,11 +89,6 @@ this order, since each one depends on the previous:
        TURN server:          <nc_talk_hpb_domain>:3478, protocols UDP and TCP
        TURN secret:          nc_talk_hpb_turn_secret (from shared_vars.yml)
 
-5. Open-Xchange mail connector - not yet implemented. connect_nextcloud_open-xchange.yml
-   currently only contains the sudo-rs workaround boilerplate shared by every playbook in this
-   repo; the openxchange_* variables in shared_vars.yml.example are reserved for it but are not
-   consumed by any task yet.
-
 You can debug all the playbooks by using this command.
 ansible-playbook <playbook_file.yml> -i inventory/hosts.ini --ask-become-pass -vv