ipv6: remove obsolete comments in route.c

Signed-off-by: NLi RongQing <roy.qing.li@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv6/route.c

@@ -1371,12 +1371,6 @@ static int ip6_dst_gc(struct dst_ops *ops)
 	return entries > rt_max_size;
 }
 
-/* Clean host part of a prefix. Not necessary in radix tree,
-   but results in cleaner routing tables.
-
-   Remove it only when all the things will work!
- */
-
 int ip6_dst_hoplimit(struct dst_entry *dst)
 {
 	int hoplimit = dst_metric_raw(dst, RTAX_HOPLIMIT);