remove support for non-ANSI compilation

*** 18,36 ****
   * information: Portions Copyright [yyyy] [name of copyright owner]
   *
   * CDDL HEADER END
   */
  /*
   * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
  #ifndef _AIO_H
  #define _AIO_H
  
- #pragma ident   "%Z%%M% %I%     %E% SMI"
- 
  #include <sys/feature_tests.h>
  #include <sys/types.h>
  #include <sys/fcntl.h>
  #include <sys/siginfo.h>
  #include <sys/aiocb.h>
--- 18,36 ----
   * information: Portions Copyright [yyyy] [name of copyright owner]
   *
   * CDDL HEADER END
   */
  /*
+  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
+  *
   * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
  #ifndef _AIO_H
  #define _AIO_H
  
  #include <sys/feature_tests.h>
  #include <sys/types.h>
  #include <sys/fcntl.h>
  #include <sys/siginfo.h>
  #include <sys/aiocb.h>
*** 102,112 ****
  #endif  /* _LP64 && _LARGEFILE64_SOURCE */
  
  /*
   * function prototypes
   */
- #if     defined(__STDC__)
  extern int      aio_read(aiocb_t *);
  extern int      aio_write(aiocb_t *);
  extern int      lio_listio(int,
                      aiocb_t *_RESTRICT_KYWD const *_RESTRICT_KYWD,
                      int, struct sigevent *_RESTRICT_KYWD);
--- 102,111 ----
*** 135,170 ****
  extern int      aio_fsync64(int, aiocb64_t *);
  extern int      aio_waitn64(aiocb64_t *[], uint_t, uint_t *,
                      const struct timespec *);
  #endif  /* _LARGEFILE64_SOURCE */
  
- #else
- extern int      aio_read();
- extern int      aio_write();
- extern int      lio_listio();
- extern int      aio_error();
- extern ssize_t  aio_return();
- extern int      aio_cancel();
- extern int      aio_suspend();
- extern int      aio_fsync();
- extern int      aio_waitn();
- 
- #if defined(_LARGEFILE64_SOURCE) && !((_FILE_OFFSET_BITS == 64) && \
-         !defined(__PRAGMA_REDEFINE_EXTNAME))
- extern int      aio_read64();
- extern int      aio_write64();
- extern int      lio_listio64();
- extern int      aio_error64();
- extern ssize_t  aio_return64();
- extern int      aio_cancel64();
- extern int      aio_suspend64();
- extern int      aio_fsync64();
- extern int      aio_waitn64();
- #endif  /* _LARGEFILE64_SOURCE */
- 
- #endif  /* __STDC__ */
- 
  #ifdef  __cplusplus
  }
  #endif
  
  #endif  /* _AIO_H */
--- 134,143 ----