[gnome-panel] ci: remove DEBIAN_FRONTEND from before_script

[Alberts Muktupāvels <muktupavels src gnome org>]

commit f866a74c81d6bc324c3fd210cfd423bc9cb1e07f
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Wed Apr 1 01:14:30 2020 +0300

    ci: remove DEBIAN_FRONTEND from before_script

 .gitlab-ci.yml | 2 --
 1 file changed, 2 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 14face0ff..88ae052e4 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -11,7 +11,6 @@ build-ubuntu:
   except:
     - tags
   before_script:
-    - export DEBIAN_FRONTEND=noninteractive
     - apt-get update
     - apt-get install -q -y --no-install-recommends
                       autoconf-archive
@@ -54,7 +53,6 @@ coverity:
   stage: analysis
   when: manual
   before_script:
-    - export DEBIAN_FRONTEND=noninteractive
     - apt-get update
     - apt-get install -q -y --no-install-recommends
                       autoconf-archive