Update obsolete comment.
@@ -125,16 +125,8 @@ struct objc_class
*/
struct reference_list *extra_data;
/**
- * New ABI. The following fields are only available with classes compiled to
- * support the new ABI. You may test whether any given class supports this
- * ABI by using the CLS_ISNEW_ABI() macro.
- */
-
- /**
- * The version of the ABI used for this class. Zero indicates the ABI first
- * implemented by clang 1.0. One indicates the presence of bitmaps
- * indicating the offsets of strong, weak, and unretained ivars. Two
- * indicates that the new ivar structure is used.
+ * The version of the ABI used for this class. Currently always zero for v2
+ * ABI classes.
*/
long abi_version;
/**
