o Remove duplicate includes.

Obtained from:	Slava Semushin via NetBSD

lib/libc/gen/siglist.c

@@ -33,7 +33,6 @@ static char sccsid[] = "@(#)siglist.c	8.1 (Berkeley) 6/4/93";
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
-#include <sys/cdefs.h>
 #include <signal.h>
 
 const char *const sys_signame[NSIG] = {

lib/libc/rpc/getnetconfig.c

@@ -42,7 +42,6 @@ __FBSDID("$FreeBSD$");
 
 #include "namespace.h"
 #include "reentrant.h"
-#include <sys/cdefs.h>
 #include <stdio.h>
 #include <errno.h>
 #include <netconfig.h>

lib/libc/rpc/getnetpath.c

@@ -41,7 +41,6 @@ __FBSDID("$FreeBSD$");
  */
 
 #include "namespace.h"
-#include <sys/cdefs.h>
 #include <stdio.h>
 #include <errno.h>
 #include <netconfig.h>

usr.bin/tr/str.c

@@ -39,7 +39,6 @@ __FBSDID("$FreeBSD$");
 static const char sccsid[] = "@(#)str.c	8.2 (Berkeley) 4/28/95";
 #endif
 
-#include <sys/cdefs.h>
 #include <sys/types.h>
 
 #include <ctype.h>

usr.sbin/ndp/ndp.c

@@ -107,7 +107,6 @@
 #include <stdlib.h>
 #include <fcntl.h>
 #include <unistd.h>
-#include <err.h>
 #include "gmt2local.h"
 
 /* packing rule for routing socket */

usr.sbin/rtadvd/rtadvd.c

@@ -49,7 +49,6 @@
 #include <time.h>
 #include <unistd.h>
 #include <stdio.h>
-#include <stdlib.h>
 #include <err.h>
 #include <errno.h>
 #include <string.h>

usr.sbin/timed/timed/globals.h

@@ -49,7 +49,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <syslog.h>
-#include <syslog.h>
 #include <unistd.h>
 
 #include <protocols/timed.h>