ramips: Remove left-over mistyped device string from 02_network

In 2011 (!), network setup for nexaira,bc2 was moved to network
defaults script with a typo so it became b2c:
295e04084c ("ramips: setup bc2 mac addresses from the generic network script")

This patch just removes the useless entry without replacement,
since it seems to have worked for 8 years anyway.

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

target/linux/ramips/base-files/etc/board.d/02_network

@@ -33,7 +33,6 @@ ramips_setup_interfaces()
 	case $board in
 	accton,wr6202|\
 	alfa-network,w502u|\
-	b2c|\
 	netcore,nw718|\
 	petatel,psr-680w|\
 	skyline,sl-r7205|\