net: ip6_fib.h: drop duplicate word in comment

Drop doubled word "the" in a comment.
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

include/net/ip6_fib.h

@@ -166,7 +166,7 @@ struct fib6_info {
 	struct fib6_node __rcu		*fib6_node;
 
 	/* Multipath routes:
-	 * siblings is a list of fib6_info that have the the same metric/weight,
+	 * siblings is a list of fib6_info that have the same metric/weight,
 	 * destination, but not the same gateway. nsiblings is just a cache
 	 * to speed up lookup.
 	 */