change: remove the settings ui

ownCloud Web recently transitioned to Vue3. The settings ui is still
written in Vue2. Since it's pretty much unused we won't take the efforts
of upgrading it to Vue3.

docs/services/settings/glossary.md

@@ -21,7 +21,6 @@ In the context of this extension and oCIS in general, we are using the following
 - Application level settings
 - e.g. default language
 - Can be modified at runtime without restarting the service
-- Typically modified in the UI
 
 ### Preferences
 
@@ -38,5 +37,4 @@ In the context of this extension and oCIS in general, we are using the following
 
 - Manifestation of a setting for a specific user
 - E.g. used for customization (at runtime) in `ocis-web`
-- `ocis-web-settings` extension for modifying settings values is provided by this service
 - Can be queried and modified by other oCIS extensions