filelog: remove version attribute (API)

This was only used by verify code. The check it was used for is now
implemented as part of the verifyintegrity() implementation. The
attribute is now unused, is revlog-specific, and isn't appropriate
to be exposing on the file storage interface. So drop it.

Differential Revision: https://phab.mercurial-scm.org/D4702

mercurial/filelog.py

@@ -27,8 +27,6 b' class filelog(object):'
         self.filename = path
         # Used by repo upgrade.
         self.index = self._revlog.index
-        # Used by verify.
-        self.version = self._revlog.version
         # Used by changegroup generation.
         self._generaldelta = self._revlog._generaldelta
 

mercurial/repository.py

@@ -737,12 +737,6 b' class ifilemutation(interfaceutil.Interf'
 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.
 

tests/simplestorerepo.py

@@ -109,8 +109,6 b' class filestorage(object):'
         # This is used by changegroup code :/
         self._generaldelta = True
 
-        self.version = 1
-
     def _refreshindex(self):
         self._indexbynode.clear()
         self._indexbyrev.clear()