Clean up headers declaration

svn path=/head/; revision=316959

usr.bin/diff/diff.c

@@ -27,11 +27,9 @@ __FBSDID("$FreeBSD$");
 
 #include <ctype.h>
 #include <err.h>
-#include <errno.h>
 #include <getopt.h>
 #include <stdlib.h>
 #include <stdio.h>
-#include <stdarg.h>
 #include <string.h>
 #include <unistd.h>
 #include <limits.h>

usr.bin/diff/diffdir.c

@@ -28,17 +28,13 @@ __FBSDID("$FreeBSD$");
 #include <dirent.h>
 #include <err.h>
 #include <errno.h>
-#include <fcntl.h>
 #include <fnmatch.h>
-#include <paths.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <unistd.h>
 #include <limits.h>
 
 #include "diff.h"
-#include "xmalloc.h"
 
 static int selectfile(const struct dirent *);
 static void diffit(struct dirent *, char *, size_t, char *, size_t, int);

usr.bin/diff/diffreg.c

@@ -80,6 +80,7 @@ __FBSDID("$FreeBSD$");
 #include <errno.h>
 #include <fcntl.h>
 #include <paths.h>
+#include <regex.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>