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 2010 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */

@@ -247,22 +249,13 @@
 int     uioafini(uio_t *, uioa_t *);
 extern  uioasync_t uioasync;
 
 #else   /* defined(_KERNEL) */
 
-#if     defined(__STDC__)
-
 extern ssize_t readv(int, const struct iovec *, int);
 extern ssize_t writev(int, const struct iovec *, int);
 
-#else   /* defined(__STDC__) */
-
-extern ssize_t readv();
-extern ssize_t writev();
-
-#endif  /* defined(__STDC__) */
-
 #endif  /* defined(_KERNEL) */
 
 #ifdef  __cplusplus
 }
 #endif