Remove #include <sys/cdefs.h>

These are not provided by standards, and as a result causes failure to
compile on musl.

https://wiki.musl-libc.org/faq.html#Q:-When-compiling-something-against-musl,-I-get-error-messages-about-%3Ccode%3Esys/cdefs.h%3C/code%3E

Change-Id: I6a357cefd106c72cfecafd898638f6b5692c2e05

main/ast_expr2.c

@@ -93,7 +93,6 @@
 
 #include "asterisk.h"
 
-#include <sys/cdefs.h>
 #include <sys/types.h>
 #include <stdio.h>
 

main/ast_expr2.y

@@ -14,7 +14,6 @@
 
 #include "asterisk.h"
 
-#include <sys/cdefs.h>
 #include <sys/types.h>
 #include <stdio.h>
 

main/editline/np/unvis.c

@@ -33,7 +33,6 @@
  * SUCH DAMAGE.
  */
 
-#include <sys/cdefs.h>
 #if defined(LIBC_SCCS) && !defined(lint)
 #if 0
 static char sccsid[] = "@(#)unvis.c	8.1 (Berkeley) 6/4/93";

main/editline/np/vis.c

@@ -34,7 +34,6 @@
  * SUCH DAMAGE.
  */
 
-#include <sys/cdefs.h>
 #if defined(LIBC_SCCS) && !defined(lint)
 __RCSID("$NetBSD: vis.c,v 1.22 2002/03/23 17:38:27 christos Exp $");
 #endif /* LIBC_SCCS and not lint */

main/editline/np/vis.h

@@ -74,8 +74,6 @@
  */
 #define	UNVIS_END	1	/* no more characters */
 
-#include <sys/cdefs.h>
-
 __BEGIN_DECLS
 char	*vis __P((char *, int, int, int));
 char	*svis __P((char *, int, int, int, const char *));

main/editline/sys.h

@@ -128,8 +128,4 @@ extern ptr_t    memset(ptr_t, int, size_t);
 extern char    *fgetline(FILE *, int *);
 #endif
 
-#ifdef HAVE_SYS_CDEFS_H
-#include <sys/cdefs.h>
-#endif
-
 #endif /* _h_sys */

utils/db1-ast/include/db.h

@@ -37,7 +37,6 @@
 #define	_DB_H 1
 
 #include <sys/types.h>
-#include <sys/cdefs.h>
 
 #include <limits.h>