[gimp/wip/nieldsg/ci-less-depss] ci: Remove some unused deps

[Niels De Graef <nielsdg src gnome org>]

commit 97090be37efa8c9017fbfe9371e5846b8db75170
Author: Niels De Graef <nielsdegraef gmail com>
Date:   Fri May 29 14:25:23 2020 +0200

    ci: Remove some unused deps

 .gitlab-ci.yml | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 0d74c2803b..e680ccb8bd 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -32,7 +32,6 @@ deps-debian/testing:
         build-essential
         git
         ffmpeg
-        graphviz-dev
         gobject-introspection
         libjson-glib-dev
         libgexiv2-dev