net: ip6_fib.h: drop duplicate word in comment

Drop doubled word "the" in a comment.

Signed-off-by: Randy Dunlap <[e-mail]>
Cc: "David S. Miller" <[e-mail]>
Cc: [e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

include/net/ip6_fib.h

···
 	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.
 	 */