delete tons of extra #includes

diff --git a/util-linux/dmesg.c b/util-linux/dmesg.c
index ed908ed..0c1c6fa 100644
--- a/util-linux/dmesg.c
+++ b/util-linux/dmesg.c
@@ -9,9 +9,8 @@
  * Licensed under GPLv2, see file LICENSE in this tarball for details.
  */
 
-#include "libbb.h"
-#include <unistd.h>
 #include <sys/klog.h>
+#include "libbb.h"
 
 int dmesg_main(int argc, char **argv);
 int dmesg_main(int argc, char **argv)