ramips: remove fixed lan/wan interface for switch configs

Don't set the lan/wan interface when using ucidef_add_switch. This
results into a wan interface albeit all ports a annotated as lan ports.

ucidef_add_switch takes care of setting the correct lan/wan interface
according to the annotation of the ports.

Signed-off-by: Mathias Kresin <dev@kresin.me>

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

@@ -24,7 +24,6 @@ ramips_setup_rt3x5x_vlans()
 			lanports="$port:lan $lanports"
 		fi
 	done
-	ucidef_set_interfaces_lan_wan "eth0.1" "eth0.2"
 	ucidef_add_switch "rt305x" $lanports $wanports "6@eth0"
 }