Remove duplicated includes.

Submitted by:	Mariusz Zaborski <oshogbo@FreeBSD.org>

sbin/dhclient/bpf.c

@@ -43,8 +43,6 @@
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
-#include <sys/capsicum.h>
-
 #include "dhcpd.h"
 #include "privsep.h"
 #include <sys/capsicum.h>

sbin/dhclient/dhclient.c

@@ -56,8 +56,6 @@
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
-#include <sys/capsicum.h>
-
 #include "dhcpd.h"
 #include "privsep.h"
 

sys/kern/kern_exec.c

@@ -35,7 +35,6 @@ __FBSDID("$FreeBSD$");
 #include <sys/param.h>
 #include <sys/capsicum.h>
 #include <sys/systm.h>
-#include <sys/capsicum.h>
 #include <sys/eventhandler.h>
 #include <sys/lock.h>
 #include <sys/mutex.h>

sys/kern/subr_capability.c

@@ -34,16 +34,14 @@ __FBSDID("$FreeBSD$");
  * Note that this file is compiled into the kernel and into libc.
  */
 
-#ifdef _KERNEL
 #include <sys/types.h>
 #include <sys/capsicum.h>
+
+#ifdef _KERNEL
 #include <sys/systm.h>
 
 #include <machine/stdarg.h>
 #else	/* !_KERNEL */
-#include <sys/types.h>
-#include <sys/capsicum.h>
-
 #include <assert.h>
 #include <stdarg.h>
 #include <stdbool.h>