Don't include system headers in php_config.h

Author: cmb69

configure.ac

@@ -43,18 +43,6 @@ AH_TOP([
 #define ZEND_DLIMPORT
 ])
 AH_BOTTOM([
-#include <stdlib.h>
-
-#ifdef HAVE_SYS_TYPES_H
-# include <sys/types.h>
-#endif
-
-#ifdef HAVE_SYS_SELECT_H
-#include <sys/select.h>
-#endif
-
-#include <string.h>
-
 #endif /* PHP_CONFIG_H */
 ])