Zend/zend_default_classes: include cleanup

Author: MaxKellermann

Zend/zend_default_classes.c

@@ -17,12 +17,9 @@
    +----------------------------------------------------------------------+
 */
 
-#include "zend.h"
-#include "zend_API.h"
+#include "zend_exceptions.h"
 #include "zend_attributes.h"
-#include "zend_builtin_functions.h"
 #include "zend_interfaces.h"
-#include "zend_exceptions.h"
 #include "zend_closures.h"
 #include "zend_generators.h"
 #include "zend_weakrefs.h"