remove obsolete apps from kde.org/applications

[Luigi Toscano]

Burkhard Lück ha scritto:
> Hi,
> 
> we do not ship the applications jovie, kfilereplace, klinkstatus, knode, kppp 
> and kremotecontrol any longer, see:
> https://download.kde.org/stable/applications/17.12.0/src/
> 
> Attached patch removes these apps from kde.org/applications.
> 
> validated index.json file with jsonlint-py

Going forward, do we want to remove any traces of them, or keep the
unmaintained applications somewhere else, clearly marked as such, for
historical purposes?
We could even keep them at the same place, but remove them from the summary
page, and add some banner.

-- 
Luigi