[gtk: 1/2] ci: Remove print-backends build option

[Matthias Clasen <matthiasc src gnome org>]

commit d37ccbffa32d25a52e99326e3c903a7bf991fa03
Author: Corey Berla <corey berla me>
Date:   Wed Jul 13 14:21:12 2022 +0000

    ci: Remove print-backends build option
    
    Flatpak CI is failing because of unknown option "print-backends".
    print-backends was renamed to print in c4d350c260879c11ea94641ac820b331aeaccc7c
    and subsequently was removed in a4aa6d79addfcc5f6b61a9aecd2b3a647e249622
    (replaced by print-cups and print-cloudprint as auto options)

 .gitlab-ci/flatpak-build.sh | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/.gitlab-ci/flatpak-build.sh b/.gitlab-ci/flatpak-build.sh
index d739e9820e..20c3a21f9f 100644
--- a/.gitlab-ci/flatpak-build.sh
+++ b/.gitlab-ci/flatpak-build.sh
@@ -19,7 +19,6 @@ flatpak build ${builddir} meson \
                 --buildtype=release \
                 -Dx11-backend=true \
                 -Dwayland-backend=true \
-                -Dprint-backends=file \
                 -Dbuild-tests=false \
                 -Dbuild-examples=false \
                 -Dintrospection=disabled \