Remove Onlyoffice doc loss warning

docs/usage.rst

@@ -14,7 +14,7 @@ You can log in with the user "admin". The password can be found by running
 
    python3 -m openappstack oas.example.org secrets
 
-Search for `userbackend_admin_password`.
+Search for ``userbackend_admin_password``.
 
 After logging in, you will see an overview of all the installed applications
 your user has access to. For more information on how to create users and give
@@ -76,15 +76,6 @@ online document editing suite. Your can open documents in Onlyoffice by clicking
 them in Nextcloud. You can open new documents by clicking the "Plus" button in
 Nextcloud and selecting Document, Spreadsheet or Presentation.
 
-.. warning::
-
-   OpenAppStack has a known issue that can cause loss of ONLYOFFICE
-   documents when the machine gets restarted or loses access to its disk.
-
-   Track the following issue to see if it is solved: https://open.greenhost.net/openappstack/nextcloud/-/issues/967
-
-   We are working hard to resolve the issue.
-
 RocketChat
 ~~~~~~~~~~