diff -r 3e7cad3967c5 -r 287a05ec7ab1 server/sources/__init__.py
--- a/server/sources/__init__.py	Tue Jan 21 18:11:30 2014 +0100
+++ b/server/sources/__init__.py	Mon Jun 17 00:07:35 2013 +0200
@@ -470,16 +470,6 @@
         """
         raise NotImplementedError(self)
 
-    def modified_entities(self, session, etypes, mtime):
-        """return a 2-uple:
-        * list of (etype, eid) of entities of the given types which have been
-          modified since the given timestamp (actually entities whose full text
-          index content has changed)
-        * list of (etype, eid) of entities of the given types which have been
-          deleted since the given timestamp
-        """
-        raise NotImplementedError(self)
-
     def index_entity(self, session, entity):
         """create an operation to [re]index textual content of the given entity
         on commit