GC.remove_stress_to_class

static VALUE
rb_gcdebug_remove_stress_to_class(int argc, VALUE *argv, VALUE self)
{
    rb_objspace_t *objspace = rb_gc_get_objspace();

    if (stress_to_class) {
        for (int i = 0; i < argc; ++i) {
            rb_hash_delete(stress_to_class, argv[i]);
        }

        if (rb_hash_size(stress_to_class) == 0) {
            stress_to_class = 0;
        }
    }

    return Qnil;
}