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-rw-r--r--internal/gc.h1
1 files changed, 0 insertions, 1 deletions
diff --git a/internal/gc.h b/internal/gc.h
index a74ad52782..df5e4d8a3b 100644
--- a/internal/gc.h
+++ b/internal/gc.h
@@ -260,7 +260,6 @@ void rb_gc_ref_update_table_values_only(st_table *tbl);
RUBY_SYMBOL_EXPORT_BEGIN
/* exports for objspace module */
-size_t rb_objspace_data_type_memsize(VALUE obj);
void rb_objspace_reachable_objects_from(VALUE obj, void (func)(VALUE, void *), void *data);
void rb_objspace_reachable_objects_from_root(void (func)(const char *category, VALUE, void *), void *data);
int rb_objspace_markable_object_p(VALUE obj);