--- a/mercurial/obsolete.py	Tue Apr 12 03:40:53 2016 -0700
+++ b/mercurial/obsolete.py	Tue Apr 12 04:06:50 2016 -0700
@@ -628,30 +628,6 @@
         transaction.hookargs['new_obsmarkers'] = str(previous + len(new))
         return len(new)
 
-    def delete(self, indices):
-        """Delete some obsmarkers from store and return how many were deleted
-
-        Indices is a list of ints which are the indices
-        of the markers to be deleted."""
-        if not indices:
-            # we don't want to rewrite the obsstore with the same content
-            return
-
-        left = []
-        current = self._all
-        n = 0
-        for i, m in enumerate(current):
-            if i in indices:
-                n += 1
-                continue
-            left.append(m)
-
-        newobsstore = self.svfs('obsstore', 'w', atomictemp=True)
-        for bytes in encodemarkers(left, True, self._version):
-            newobsstore.write(bytes)
-        newobsstore.close()
-        return n
-
     def mergemarkers(self, transaction, data):
         """merge a binary stream of markers inside the obsstore