Don't include netinet/tcp_timer.h when not needed

Reviewed by:		glebius
MFC after:		1 week
Sponsored by:		Netflix, Inc.
Differential Revision:	https://reviews.freebsd.org/D50889

sbin/ipf/ipsend/iptests.c

@@ -74,7 +74,6 @@ typedef	int	boolean_t;
 #  include <netinet/in_pcb.h>
 # endif
 #include "ipsend.h"
-# include <netinet/tcp_timer.h>
 # include <netinet/tcp_var.h>
 #if defined(__NetBSD_Version__) && (__NetBSD_Version__ >= 106000000)
 # define USE_NANOSLEEP

sbin/ipf/ipsend/sock.c

@@ -58,7 +58,6 @@ typedef int     boolean_t;
 #include <netinet/ip_var.h>
 #define	_WANT_INPCB
 #include <netinet/in_pcb.h>
-#include <netinet/tcp_timer.h>
 #define	_WANT_TCPCB
 #include <netinet/tcp_var.h>
 #include <stdio.h>

usr.bin/netstat/inet.c

@@ -58,7 +58,6 @@
 #include <netinet/tcp_seq.h>
 #define	TCPSTATES
 #include <netinet/tcp_fsm.h>
-#include <netinet/tcp_timer.h>
 #include <netinet/tcp_var.h>
 #include <netinet/udp.h>
 #include <netinet/udp_var.h>

usr.bin/systat/netstat.c

@@ -60,7 +60,6 @@
 #include <netinet/tcp_seq.h>
 #define TCPSTATES
 #include <netinet/tcp_fsm.h>
-#include <netinet/tcp_timer.h>
 #define	_WANT_TCPCB
 #include <netinet/tcp_var.h>
 #include <netinet/udp.h>

usr.bin/systat/tcp.c

@@ -41,7 +41,6 @@
 #include <netinet/tcp.h>
 #include <netinet/tcp_seq.h>
 #include <netinet/tcp_fsm.h>
-#include <netinet/tcp_timer.h>
 #include <netinet/tcp_var.h>
 
 #include <inttypes.h>