gluon-mesh-batman-adv: Remove ebtables filter for bat0

This change alles meshed PARKER-Nodes to forward IPv6 to the next node.

Signed-off-by: Chrissi^ <chris@tinyhost.de>

package/gluon-mesh-batman-adv/files/lib/gluon/ebtables/300-radv-input-output

-rule 'INPUT -p IPv6 --ip6-protocol ipv6-icmp --ip6-icmp-type router-solicitation -i bat0 -j DROP'
-rule 'OUTPUT -p IPv6 --ip6-protocol ipv6-icmp --ip6-icmp-type router-advertisement -o bat0 -j DROP'