[gnome-builder] remove .buildconfig

[Christian Hergert <chergert src gnome org>]

commit d97134775e61e98bc90a8c693b7d068ca6c8e86d
Author: Christian Hergert <chergert redhat com>
Date:   Fri Feb 17 17:33:06 2017 -0800

    remove .buildconfig
    
    As we progress towards making Flatpak the preferred build configuration
    backend, we can drop this config file.

 .buildconfig |    8 --------
 1 files changed, 0 insertions(+), 8 deletions(-)