fff-network: Remove unused file for WR841N v12

The WR841 v12 is using the file from v11, the new file has never
been used.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

Tested-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Reviewed-by: Tim Niemeyer <tim@tn-x.org>

src/packages/fff/fff-network/ar71xx/network.tl-wr841n-v12

-
-WANDEV=eth1
-SWITCHDEV=eth0
-CLIENT_PORTS="1 2 0t"
-WAN_PORTS=
-BATMAN_PORTS="3 4 0t"
-
-ETHMESHMAC=eth1
-ROUTERMAC=eth0