Remove declarations of setjmp and longjmp.

From-SVN: r6240

gcc/protoize.c

 /* Protoize program - Original version by Ron Guilmette at MCC.
 
-   Copyright (C) 1989, 1992 Free Software Foundation, Inc.
+   Copyright (C) 1989, 1992, 1993 Free Software Foundation, Inc.
 
 This file is part of GNU CC.
 
@@ -161,16 +161,6 @@ extern int link ();
 extern int unlink ();
 extern int access ();
 extern int execvp ();
-/* In 2.6, try deleting these decls entirely since setjmp.h should
-   take care of them.  */
-#ifndef __NeXT__
-#ifndef setjmp
-extern int setjmp ();
-#endif
-#ifndef longjmp
-extern void longjmp ();
-#endif
-#endif
 
 #if 0 /* size_t from sys/types.h may fail to match GCC.
 	 If so, we would get a warning from this.  */