manifest: Untag gnome-control-center
manifest: Untag gnome-control-center

Now that the multiple submodules works.

chergert/gnome-continuous,djdeath/gnome-ostree,GNOME/gnome-ostree,chergert/gnome-continuous,GNOME/gnome-ostree,vrutkovs/vrutkovs.github.io,chergert/gnome-continuous,djdeath/gnome-ostree,vrutkovs/vrutkovs.github.io,vrutkovs/vrutkovs.github.io,djdeath/gnome-ostree,GNOME/gnome-ostree