diff --git a/cinder/objects/base.py b/cinder/objects/base.py
index 7a0191fdd16..b01beb41c6a 100644
--- a/cinder/objects/base.py
+++ b/cinder/objects/base.py
@@ -139,11 +139,6 @@ class CinderObject(base.VersionedObject):
     # from one another.
     OBJ_PROJECT_NAMESPACE = 'cinder'
 
-    # NOTE(thangp): As more objects are added to cinder, each object should
-    # have a custom map of version compatibility.  This just anchors the base
-    # version compatibility.
-    VERSION_COMPATIBILITY = {'7.0.0': '1.0'}
-
     def cinder_obj_get_changes(self):
         """Returns a dict of changed fields with tz unaware datetimes.