Remove unused class serial

Before object shapes, we were using class serial to invalidate
inline caches. Now that we use shape_id for inline cache keys,
the class serial is unnecessary.

Co-Authored-By: Aaron Patterson <tenderlove@ruby-lang.org>

1 files changed, 0 insertions, 3 deletions

diff --git a/gc.c b/gc.c
index f2599adbde..cc7b338062 100644
--- a/gc.c
+++ b/gc.c
@@ -3463,9 +3463,6 @@ obj_free(rb_objspace_t *objspace, VALUE obj)
         if (FL_TEST_RAW(obj, RCLASS_SUPERCLASSES_INCLUDE_SELF)) {
             xfree(RCLASS_SUPERCLASSES(obj));
         }
-#if SIZEOF_SERIAL_T != SIZEOF_VALUE && USE_RVARGC
-        xfree(RCLASS(obj)->class_serial_ptr);
-#endif
 
 #if !USE_RVARGC
         if (RCLASS_EXT(obj))