Remove redundant declaration of the perror() function, it's provided by stdio.h.

Don't define DKTYPENAMES without using it.

sbin/fsck/fsck.c

@@ -46,7 +46,6 @@ __FBSDID("$FreeBSD$");
 #include <sys/queue.h>
 #include <sys/wait.h>
 #define FSTYPENAMES
-#define DKTYPENAMES
 #include <sys/disklabel.h>
 #include <sys/ioctl.h>
 

sbin/fsck/fsutil.h

@@ -31,7 +31,6 @@
  * $FreeBSD$
  */
 
-void perror(const char *);
 void errexit(const char *, ...)
     __attribute__((__noreturn__,__format__(__printf__,1,2)));  
 void pfatal(const char *, ...)