tree c0bbd4bdd20925d34a530265dccab141ad5c69a7
parent 9d0ab2f4ec311c7e618bf553e108f9cd2f9cf316
author Dave Borowitz <dborowitz@google.com> 1544740248 -0800
committer Dave Borowitz <dborowitz@google.com> 1544811532 -0800

ChangeNotes: Remove support for readOnlyUntil

This was used only by the primary storage migration code, which is now
gone. No additional data migration is needed:
 * Unknown footers in NoteDb commits are silently ignored.
 * Deserializing protos persisted in the ChangeNotesCache will ignore
   the unknown fields.

Change-Id: I45b5736efa3d43584560ea93aeaefe3ea4fd4e80