Clean up old bridge related stuff
Clean up old bridge related stuff

Since we aren't using Linux bridges for the NICs we don't need to bring up any
devices.

mzagozen/vrnetlab,plajjan/vrnetlab,mzagozen/vrnetlab,plajjan/vrnetlab,holmahenkel/vrnetlab,bdreisbach/vrnetlab,holmahenkel/vrnetlab,bdreisbach/vrnetlab