Delete use of IN_GCC to control stddef.h/gstddef.h include.

From-SVN: r6948

gcc/objc/hash.h

@@ -27,11 +27,7 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 #ifndef __hash_INCLUDE_GNU
 #define __hash_INCLUDE_GNU
 
-#ifdef IN_GCC
-#include "gstddef.h"
-#else
-#include "stddef.h"
-#endif
+#include <stddef.h>
 
 /*
  * This data structure is used to hold items

gcc/objc/objc.h

@@ -30,11 +30,7 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 extern "C" {
 #endif
 
-#ifdef IN_GCC
-#include "gstddef.h"
-#else
-#include "stddef.h"
-#endif
+#include <stddef.h>
 
 /*
 ** Definition of the boolean type.  

gcc/objc/sarray.h

@@ -39,11 +39,7 @@ extern const char* __objc_sparse2_id;
 extern const char* __objc_sparse3_id;
 #endif
 
-#ifdef IN_GCC
-#include "gstddef.h"
-#else
-#include "stddef.h"
-#endif
+#include <stddef.h>
 
 extern int nbuckets;		/* for stats */
 extern int nindices;