[simple-scan] Don't CI on the Ubuntu LTS - it's likely to have out of date packages

[Robert Ancell <rancell src gnome org>]

commit a0d8ca701ce8d2764e6e118df2097dab36d269a9
Author: Robert Ancell <robert ancell canonical com>
Date:   Thu Dec 7 10:40:45 2017 +1300

    Don't CI on the Ubuntu LTS - it's likely to have out of date packages

 .gitlab-ci.yml | 12 +-----------
 1 file changed, 1 insertion(+), 11 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 4c9897e..d29f8fc 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,17 +1,7 @@
 stages:
  - build
 
-build-ubuntu-lts:
-  image: ubuntu:latest
-  stage: build
-  before_script:
-    - apt-get update
-    - apt-get install -q -y meson valac gettext itstool libgtk-3-dev libgusb-dev libcolord-dev 
libpackagekit-glib2-dev libwebp-dev libsane-dev
-  script:
-    - meson _build
-    - ninja -C _build install
-
-build-ubuntu-latest:
+build-ubuntu:
   image: ubuntu:rolling
   stage: build
   before_script: