network: Remove the Wired section

network: Remove the Wired section

This is a part of the new system status design, see
https://wiki.gnome.org/GnomeShell/Design/Guidelines/SystemStatus/
for design details.

Note that this does have an interesting side effect of not showing
network connectivity status on wired. This is intentional, and error
states will still be shown in the top bar when they happen.

This also means that if you're connected to both wired and wireless,
even though wired is the default route, we'll first notice the wireless
active connection, and we'll show that in the top bar. New NM API that
will help figuring out the active connection of the default device is
being implemented to stop this from happening.

https://bugzilla.gnome.org/show_bug.cgi?id=704670