ipv4: remove is_data also from ip_options documentation.

commit ef722495
( [IPV4]: Remove unused ip_options->is_data) removed the unused is_data
member from ip_options struct.

This patch removes is_data also from the documentation of the ip_options struct.
Signed-off-by: Rami Rosen <ramirose@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/inet_sock.h

@@ -32,7 +32,6 @@
  *
  * @faddr - Saved first hop address
  * @nexthop - Saved nexthop address in LSRR and SSRR
- * @is_data - Options in __data, rather than skb
  * @is_strictroute - Strict source route
  * @srr_is_hit - Packet destination addr was our one
  * @is_changed - IP checksum more not valid