Revert "Fix crash caused by concurrent ObjectSpace.dump_all calls"

This reverts commit 9a62fd3cbae2ebb60e2f9cad782af1ad18db4319.

1 files changed, 1 insertions, 5 deletions

diff --git a/gc.c b/gc.c
index 2c3d3e1100..510b83c817 100644
--- a/gc.c
+++ b/gc.c
@@ -11935,11 +11935,7 @@ static void
 reachable_objects_from_callback(VALUE obj)
 {
     rb_ractor_t *cr = GET_RACTOR();
-    struct gc_mark_func_data_struct *cur_mfd = cr->mfd;
-    cur_mfd->mark_func(obj, cr->mfd->data);
-    /* mark_func might give up the GVL, in which time some other thread might set
-       mfd. In that case, set it back to the right value for this thread. */
-    cr->mfd = cur_mfd;
+    cr->mfd->mark_func(obj, cr->mfd->data);
 }
 
 void