net: Kill set_dst_metric_rtt().

No longer used.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/dst.h b/include/net/dst.h
index b2634e4..5161046 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -209,12 +209,6 @@
 	return msecs_to_jiffies(dst_metric(dst, metric));
 }
 
-static inline void set_dst_metric_rtt(struct dst_entry *dst, int metric,
-				      unsigned long rtt)
-{
-	dst_metric_set(dst, metric, jiffies_to_msecs(rtt));
-}
-
 static inline u32
 dst_allfrag(const struct dst_entry *dst)
 {