.gitlab-ci.yml: remove --alias=sid from testing chroot

.gitlab-ci.yml

@@ -11,7 +11,7 @@ build:
     - test -d /srv/chroot/unstable-sbuild && test "$(stat -c %Y /srv/chroot/unstable-sbuild)" -lt "$(date --date "14 days ago" +%s)" && rm -rf /srv/chroot/unstable-sbuild /etc/schroot/chroot.d/unstable-amd64-sbuild-*
     - test -d /srv/chroot/testing-sbuild && test "$(stat -c %Y /srv/chroot/testing-sbuild)" -lt "$(date --date "14 days ago" +%s)" && rm -rf /srv/chroot/testing-sbuild /etc/schroot/chroot.d/testing-amd64-sbuild-*
     - test -d /srv/chroot/unstable-sbuild || sbuild-createchroot --debootstrap=mmdebstrap --alias=sid unstable /srv/chroot/unstable-sbuild http://deb.debian.org/debian
-    - test -d /srv/chroot/testing-sbuild || sbuild-createchroot --debootstrap=mmdebstrap --alias=sid testing /srv/chroot/testing-sbuild http://deb.debian.org/debian
+    - test -d /srv/chroot/testing-sbuild || sbuild-createchroot --debootstrap=mmdebstrap testing /srv/chroot/testing-sbuild http://deb.debian.org/debian
     - id build >/dev/null || adduser --gecos build --disabled-password build
     - id build >/dev/null || adduser build sbuild
     - chown build -R .