Delete the conditional that used to semi-avoid interference with sys/stdtypes.h on Sun.

Delete the conditional that used to semi-avoid
interference with sys/stdtypes.h on Sun.  (fixincludes makes it ok.)

From-SVN: r5332

gcc/ginclude/stddef.h

@@ -13,10 +13,6 @@
 #define _ANSI_STDDEF_H
 #endif
 
-#ifndef __sys_stdtypes_h
-/* This avoids lossage on SunOS but only if stdtypes.h comes first.
-   There's no way to win with the other order!  Sun lossage.  */
-
 /* On 4.3bsd-net2, make sure ansi.h is included, so we have
    one less case to deal with in the following.  */
 #if defined (__BSD_NET2__) || defined (____386BSD____)
@@ -200,8 +196,6 @@ typedef __WCHAR_TYPE__ wchar_t;
 #endif
 #endif /* _ANSI_H_ */
 
-#endif /* __sys_stdtypes_h */
-
 /* A null pointer constant.  */
 
 #if defined (_STDDEF_H) || defined (__need_NULL)