diff --git a/glance_store/_drivers/rbd.py b/glance_store/_drivers/rbd.py
index 776dee21..145750e7 100644
--- a/glance_store/_drivers/rbd.py
+++ b/glance_store/_drivers/rbd.py
@@ -457,14 +457,6 @@ class Store(driver.Store):
             'snapshot': DEFAULT_SNAPNAME,
         }, self.conf)
 
-    def _snapshot_has_external_reference(self, image, snapshot_name):
-        """Returns True if snapshot has external reference else False.
-        """
-        image.set_snap(snapshot_name)
-        has_references = bool(image.list_children())
-        image.set_snap(None)
-        return has_references
-
     def _delete_image(self, target_pool, image_name,
                       snapshot_name=None, context=None):
         """