bridge: Remove unused age_list

This patch removes the unused age_list member from the net_bridge
structure.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --cc net/bridge/br_if.c
Simple merge

diff --cc net/bridge/br_private.h
Simple merge