[librsvg] CI: drop ubuntu builds since rustc package is outdated.

[Jordan Petridis <jpetridis src gnome org>]

commit 44bf347b084ec916b5148ddf24e0ad19d7003cce
Author: Jordan Petridis <jordanpetridis protonmail com>
Date:   Sun Jul 1 10:36:31 2018 +0000

    CI: drop ubuntu builds since rustc package is outdated.

 .gitlab-ci.yml | 12 ------------
 1 file changed, 12 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 0a9a6af9..7494f25c 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -165,11 +165,6 @@ debian:testing:
   <<: *distro_test
   <<: *stage_2
 
-ubuntu:18.04:
-  image: $AMD64_UBUNTU_BIONIC
-  <<: *distro_test
-  <<: *stage_2
-
 debian_i386:testing:
   image: $I386_DEBIAN_TESTING
   variables:
@@ -177,13 +172,6 @@ debian_i386:testing:
   <<: *distro_test
   <<: *stage_2
 
-ubuntu_i386:18.04:
-  image: $I386_UBUNTU_BIONIC
-  variables:
-    LIBRSVG_DEBUG: "yes"
-  <<: *distro_test
-  <<: *stage_2
-
 # STAGE 3 CROSS DISTRO TESTS
 #######################################################################