doc: remove GSoC info
This page is the first point for anyone interested in contributing to Elektra!
-## GSoC 2018
-
-This page is also the central point for students interested in contributing to Elektra during
-[Google Summer of Code 2018](https://summerofcode.withgoogle.com).
-
-Google Summer of Code is a opportunity for you to get paid while working on free software
-initiatives during summer:
-
-- [Timeline is available here.](https://developers.google.com/open-source/gsoc/timeline)
-- [Flyers can be found here.](https://developers.google.com/open-source/gsoc/resources/media)
-
-> Disclaimer: We do not yet know if we will participate!
-
-### Which GSoC projects are available?
-
-We think that GSoC is a perfect opportunity to bridge Elektra and other free
-software projects. So the ideal GSoC project is to elektrify some free software.
-
-Elektra may be used for applications (frameworks) like KDE, GNOME,
-and LXCE or for any applications that need to read configuration files,
-access environment variables, or command-line parameters.
-
-Some possible tasks are:
-
-- Integrate applications (or frameworks) into Elektra.
-- Arbitrary nesting of plugins.
-- Expore further ways of how configuration can be validated.
-- The Qt-GUI could be improved by integrating validation.
-
-## What are the requirements to participate?
-
-- At least one PR submitted to Elektra (see below for details).
-- Fluent in English or German
-- Good writing skills in English
-- Profound programming skills with focus on good code quality, documentation and unit tests.
-- Ideally experience with an application (framework) or even author of a FLOSS application
-
-
