[PATCH net] net/tcp_fastopen: remove obsolete extern

From: Eric Dumazet <edumazet@google.com>

After cited commit, sysctl_tcp_fastopen_blackhole_timeout is no longer
a global variable.

Fixes: 3733be14a32b ("ipv4: Namespaceify tcp_fastopen_blackhole_timeout knob")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Haishuang Yan <redacted>
Cc: Wei Wang <redacted>
Cc: Yuchung Cheng <redacted>
Cc: Neal Cardwell <ncardwell@google.com>
---
 include/net/tcp.h | 1 -
 1 file changed, 1 deletion(-)

diff --git a/include/net/tcp.h b/include/net/tcp.h
index 17df9b047ee46dabed8797246f99e1a2fd39c243..784d5c3ef1c5be0b54194711ff7f306d271d95c3 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h

@@ -1709,7 +1709,6 @@ struct tcp_fastopen_context {
 	struct rcu_head	rcu;
 };
 
-extern unsigned int sysctl_tcp_fastopen_blackhole_timeout;
 void tcp_fastopen_active_disable(struct sock *sk);
 bool tcp_fastopen_active_should_disable(struct sock *sk);
 void tcp_fastopen_active_disable_ofo_check(struct sock *sk);

-- 
2.32.0.402.g57bb445576-goog