rtnetlink: remove IFLA_BOND_SLAVE definition

This is in net-next only, for couple of days. Not used anymore, and never
should have been. So just remove it and pretend it was never there.

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index 206f651..16410b6 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -144,7 +144,6 @@
 	IFLA_NUM_RX_QUEUES,
 	IFLA_CARRIER,
 	IFLA_PHYS_PORT_ID,
-	IFLA_BOND_SLAVE,
 	__IFLA_MAX
 };