diff -r 97986c9c69d3 -r 68282a7b29a7 mercurial/repository.py
--- a/mercurial/repository.py	Wed Sep 19 11:17:28 2018 -0700
+++ b/mercurial/repository.py	Wed Sep 19 11:20:02 2018 -0700
@@ -737,12 +737,6 @@
 class ifilestorage(ifileindex, ifiledata, ifilemutation):
     """Complete storage interface for a single tracked file."""
 
-    version = interfaceutil.Attribute(
-        """Version number of storage.
-
-        TODO this feels revlog centric and could likely be removed.
-        """)
-
     _generaldelta = interfaceutil.Attribute(
         """Whether deltas can be against any parent revision.