[gjs] Fix CI by removing Docker service

[Philip Chimento <pchimento src gnome org>]

commit 220ad36d978525f776a0f3dc3427c1b5ed1f1059
Author: Philip Chimento <philip chimento gmail com>
Date:   Wed Nov 18 15:02:44 2020 -0800

    Fix CI by removing Docker service
    
    Per alatiera on #gnome-hackers, if we don't have any DinD jobs then we
    don't need this, and it is causing us to hit a Docker rate limit.
    
    Unreviewed, pushing to fix build.

 .gitlab-ci.yml | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index e46d9447..d07d55eb 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,7 +1,5 @@
 # SPDX-License-Identifier: MIT OR LGPL-2.0-or-later
-services:
-  - docker
-
+---
 stages:
 - source_check
 - test