[TCP]: Unexport sysctl_tcp_tw_recycle

Unexport sysctl_tcp_tw_recycle; nothing is using it in modules (it's quite
internal to the ipv4 code after all); as a bonus item it gets rid of an
ifdef...
Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/tcp_minisocks.c

@@ -1075,7 +1075,3 @@ EXPORT_SYMBOL(tcp_child_process);
 EXPORT_SYMBOL(tcp_create_openreq_child);
 EXPORT_SYMBOL(tcp_timewait_state_process);
 EXPORT_SYMBOL(tcp_tw_deschedule);
-
-#ifdef CONFIG_SYSCTL
-EXPORT_SYMBOL(sysctl_tcp_tw_recycle);
-#endif