lib9/utf: remove unneccesary includes

R=golang-dev, r, bradfitz
CC=golang-dev
https://golang.org/cl/8651043

src/lib9/utf/rune.c

@@ -12,8 +12,6 @@
  * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
  * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
  */
-#include <stdarg.h>
-#include <string.h>
 #include "utf.h"
 #include "utfdef.h"
 

src/lib9/utf/utfecpy.c

@@ -11,7 +11,7 @@
  * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
  * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
  */
-#include <stdarg.h>
+#define _BSD_SOURCE 1
 #include <string.h>
 #include "utf.h"
 #include "utfdef.h"

src/lib9/utf/utflen.c

@@ -11,8 +11,6 @@
  * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
  * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
  */
-#include <stdarg.h>
-#include <string.h>
 #include "utf.h"
 #include "utfdef.h"
 

src/lib9/utf/utfnlen.c

@@ -11,8 +11,6 @@
  * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
  * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
  */
-#include <stdarg.h>
-#include <string.h>
 #include "utf.h"
 #include "utfdef.h"
 

src/lib9/utf/utfrrune.c

@@ -11,7 +11,6 @@
  * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
  * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
  */
-#include <stdarg.h>
 #include <string.h>
 #include "utf.h"
 #include "utfdef.h"

src/lib9/utf/utfrune.c

@@ -11,7 +11,6 @@
  * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
  * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
  */
-#include <stdarg.h>
 #include <string.h>
 #include "utf.h"
 #include "utfdef.h"

src/lib9/utf/utfutf.c

@@ -11,7 +11,6 @@
  * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
  * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
  */
-#include <stdarg.h>
 #include <string.h>
 #include "utf.h"
 #include "utfdef.h"