slirp: Drop statistic code

As agreed on the mailing list, there is no interest in keeping the
usually disabled slirp statistics in the tree. So this patch removes
them.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/slirp/tcp_subr.c b/slirp/tcp_subr.c
index 892bd83..868382a 100644
--- a/slirp/tcp_subr.c
+++ b/slirp/tcp_subr.c
@@ -222,9 +222,7 @@
 	if (TCPS_HAVERCVDSYN(tp->t_state)) {
 		tp->t_state = TCPS_CLOSED;
 		(void) tcp_output(tp);
-		STAT(tcpstat.tcps_drops++);
-	} else
-		STAT(tcpstat.tcps_conndrops++);
+	}
 	return (tcp_close(tp));
 }
 
@@ -261,7 +259,6 @@
 	sbfree(&so->so_rcv);
 	sbfree(&so->so_snd);
 	sofree(so);
-	STAT(tcpstat.tcps_closed++);
 	return ((struct tcpcb *)0);
 }
 
@@ -442,8 +439,6 @@
 
 	tcp_template(tp);
 
-	STAT(tcpstat.tcps_connattempt++);
-
 	tp->t_state = TCPS_SYN_SENT;
 	tp->t_timer[TCPT_KEEP] = TCPTV_KEEP_INIT;
 	tp->iss = tcp_iss;