filelog: drop index attribute (API) The previous commit removed the last consumer of the "index" attribute on the file storage interface. The index is an extremely low-level data structure that is revlog specific and isn't appropriate to expose as part of a generic storage API. There may be a market for an efficient data structure to obtain metadata on every revision for a file. But if there is, it should be designed using e.g. named attributes for lookup instead of a list-like of 8-tuples. Let's drop the attribute from filelog and remove the attribute from the file storage interface. Differential Revision: https://phab.mercurial-scm.org/D4720

--- a/mercurial/filelog.py	Mon Sep 24 09:38:27 2018 -0700
+++ b/mercurial/filelog.py	Thu Sep 20 19:31:07 2018 -0700
@@ -25,8 +25,6 @@
         # Full name of the user visible file, relative to the repository root.
         # Used by LFS.
         self._revlog.filename = path
-        # Used by repo upgrade.
-        self.index = self._revlog.index
         # Used by changegroup generation.
         self._generaldelta = self._revlog._generaldelta