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 _SYS_SENDFILE_H
  #define _SYS_SENDFILE_H
  
- #pragma ident   "%Z%%M% %I%     %E% SMI"
- 
  #include <sys/feature_tests.h>
  
  #ifdef  __cplusplus
  extern "C" {
  #endif
--- 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 _SYS_SENDFILE_H
  #define _SYS_SENDFILE_H
  
  #include <sys/feature_tests.h>
  
  #ifdef  __cplusplus
  extern "C" {
  #endif
*** 126,153 ****
  #define sendfilev64                     sendfilev
  #define sendfile64                      sendfile
  #endif  /* __PRAGMA_REDEFINE_EXTNAME */
  #endif  /* _LP64 && _LARGEFILE64_SOURCE */
  
- #ifdef  __STDC__
  extern ssize_t sendfilev(int, const struct sendfilevec *, int, size_t *);
  extern ssize_t sendfile(int, int, off_t *, size_t);
  /* Transitional largefile interface */
  #if     defined(_LARGEFILE64_SOURCE) && !((_FILE_OFFSET_BITS == 64) && \
              !defined(__PRAGMA_REDEFINE_EXTNAME))
  extern ssize_t sendfilev64(int, const struct sendfilevec64 *, int, size_t *);
  extern ssize_t sendfile64(int, int, off64_t *, size_t);
  #endif
- #else   /* __STDC__ */
- extern int sendfilev();
- extern int sendfile();
- #if     defined(_LARGEFILE64_SOURCE) && !((_FILE_OFFSET_BITS == 64) && \
-             !defined(__PRAGMA_REDEFINE_EXTNAME))
- extern int sendfilev64();
- extern int sendfile64();
- #endif
- #endif  /* __STDC__ */
  #endif  /* _KERNEL */
  
  #ifdef  __cplusplus
  }
  #endif
--- 126,143 ----