[NEIGHBOUR]: Remove unused fields in struct neigh_parms and neigh_table

	struct neigh_parms *next;

	int	(*neigh_setup)(struct neighbour *);

	struct neigh_table *tbl;

	int	entries;

	void	*priv;

	void	*sysctl_table;

	atomic_t		entries;

	rwlock_t		lock;

	unsigned long		last_rand;

	struct neigh_parms	*parms_list;

	kmem_cache_t		*kmem_cachep;

	struct neigh_statistics	*stats;

	struct neighbour	**hash_buckets;