remove support for non-ANSI compilation

@@ -17,10 +17,12 @@
  * information: Portions Copyright [yyyy] [name of copyright owner]
  *
  * CDDL HEADER END
  */
 /*
+ * Copyright 2014 Garrett D'Amore <garrett@damore.org>
+ *
  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */

@@ -158,15 +160,11 @@
 extern void mdpreboot(int, int, char *);
 extern int kadmin(int, int, void *, cred_t *);
 extern void killall(zoneid_t);
 #endif
 
-#if defined(__STDC__)
 extern int uadmin(int, int, uintptr_t);
-#else
-extern int uadmin();
-#endif
 
 #endif  /* _ASM */
 
 #ifdef  __cplusplus
 }