1 files changed, 0 insertions, 11 deletions
diff --git a/thread.c b/thread.c
index 89c5572201..54055746db 100644
--- a/thread.c
+++ b/thread.c
@@ -4920,17 +4920,6 @@ rb_thread_shield_new(void)
     return thread_shield;
 }
 
-bool
-rb_thread_shield_owned(VALUE self)
-{
-    VALUE mutex = GetThreadShieldPtr(self);
-    if (!mutex) return false;
-
-    rb_mutex_t *m = mutex_ptr(mutex);
-
-    return m->fiber == GET_EC()->fiber_ptr;
-}
-
 /*
  * Wait a thread shield.
  *