llc: Remove stray reference to sysctl_llc_station_ack_timeout.

Signed-off-by: David S. Miller <[e-mail]>

include/net/llc.h

···
 extern int sysctl_llc2_busy_timeout;
 extern int sysctl_llc2_p_timeout;
 extern int sysctl_llc2_rej_timeout;
-extern int sysctl_llc_station_ack_timeout;
 #else
 #define llc_sysctl_init() (0)
 #define llc_sysctl_exit() do { } while(0)

net/llc/sysctl_net_llc.c

···
 };
 
 static struct ctl_table llc_station_table[] = {
-	{
-		.procname	= "ack_timeout",
-		.data		= &sysctl_llc_station_ack_timeout,
-		.maxlen		= sizeof(long),
-		.mode		= 0644,
-		.proc_handler   = proc_dointvec_jiffies,
-	},
 	{ },
 };