[gtk] Disable CI

[Emmanuele Bassi <ebassi src gnome org>]

commit da6b68d2b7e1c4878d69e92ae0cd3bc7b7b5760d
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Mon Feb 12 17:16:51 2018 +0000

    Disable CI
    
    The CI runner is pretty slow to set up (takes about 6 minutes to get
    through the system dependencies needed to build GTK), and does not work
    with dependencies as subprojects.
    
    Until we figure out how to make it work, and make it work a bit faster,
    we should drop CI and rely on Continuous for a while longer.
    
    We can revert this commit as soon as we find out how to make things
    work.

 .gitlab-ci.yml | 26 --------------------------
 1 file changed, 26 deletions(-)