Remove functions and macros unused on MS-Windows.

src/w32.c (sys_chown): Remove unused function.

 nt/inc/ms-w32.h (chown, logb): Remove, unused.

nt/ChangeLog

@@ -2,6 +2,7 @@
 
 	* inc/ms-w32.h (__STDC__): Fiddle with value only for MSVC.
 	(Bug#9066)
+	(chown, logb): Remove, unused.
 
 2013-02-13  Juanma Barranquero  <lekktu@gmail.com>
 

nt/inc/ms-w32.h

@@ -149,7 +149,6 @@ extern char *getenv ();
 #define chdir   sys_chdir
 #undef chmod
 #define chmod   sys_chmod
-#define chown   sys_chown
 #undef close
 #define close   sys_close
 #undef creat
@@ -222,7 +221,6 @@ typedef int pid_t;
 #define strtoll   _strtoi64
 #endif
 #define isatty    _isatty
-#define logb      _logb
 #define _longjmp  longjmp
 #define lseek     _lseek
 #define popen     _popen

src/ChangeLog

@@ -1,5 +1,7 @@
 2013-02-16  Eli Zaretskii  <eliz@gnu.org>
 
+	* w32.c (sys_chown): Remove unused function.
+
 	* w32term.c <input_signal_count>: Declare 'volatile'
 	unconditionally.  (Bug#9066)
 

src/w32.c

@@ -3219,14 +3219,6 @@ sys_chmod (const char * path, int mode)
   return _chmod (path, mode);
 }
 
-int
-sys_chown (const char *path, uid_t owner, gid_t group)
-{
-  if (sys_chmod (path, S_IREAD) == -1) /* check if file exists */
-    return -1;
-  return 0;
-}
-
 int
 sys_creat (const char * path, int mode)
 {