ipv4: remove unused member in fib_table.

This patch removes an unused parameter (tb_stamp) from fib_table
structure in include/net/ip_fib.h.
Signed-off-by: NRami Rosen <ramirose@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/net/ip_fib.h

@@ -145,7 +145,6 @@ struct fib_result_nl {
 struct fib_table {
 	struct hlist_node tb_hlist;
 	u32		tb_id;
-	unsigned	tb_stamp;
 	int		tb_default;
 	int		(*tb_lookup)(struct fib_table *tb, const struct flowi *flp, struct fib_result *res);
 	int		(*tb_insert)(struct fib_table *, struct fib_config *);