Revert improvement to list.append() checked in before it was ready.
diff --git a/Include/listobject.h b/Include/listobject.h
index 6221b80..14ed72e 100644
--- a/Include/listobject.h
+++ b/Include/listobject.h
@@ -22,7 +22,6 @@
 typedef struct {
     PyObject_VAR_HEAD
     PyObject **ob_item;
-    int allocated;
 } PyListObject;
 
 PyAPI_DATA(PyTypeObject) PyList_Type;