Change: remove unavailable web config options

We've removed config options from the web package, that are no longer available in web.
Check the web changelog for more details.

https://github.com/owncloud/ocis/pull/9679
https://github.com/owncloud/web/pull/11256
https://github.com/owncloud/web/pull/10122
https://github.com/owncloud/web/pull/11260
