Remove BTrees/convert.py, which hasn't been of use for years.

MANIFEST

@@ -61,7 +61,6 @@ src/BTrees/_OOBTree.c
 src/BTrees/__init__.py
 src/BTrees/_fsBTree.c
 src/BTrees/check.py
-src/BTrees/convert.py
 src/BTrees/intkeymacros.h
 src/BTrees/intvaluemacros.h
 src/BTrees/objectkeymacros.h

NEWS.txt

@@ -118,6 +118,10 @@ BTrees
 - (3.5a4) Collector 1829.  Clarified that the ``minKey()`` and ``maxKey()``
   methods raise an exception if no key exists satsifying the constraints.
 
+- (3.5a4) The ancient ``convert.py`` script was removed.  It was intended to
+  convert "old" BTrees to "new" BTrees, but the "old" BTree implementation
+  was removed from ZODB years ago.
+
 
 What's new in ZODB3 3.4.1a6?
 ============================

src/BTrees/convert.py

-##############################################################################
-#
-# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
-# All Rights Reserved.
-#
-# This software is subject to the provisions of the Zope Public License,
-# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
-# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
-# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
-# FOR A PARTICULAR PURPOSE
-#
-##############################################################################
-
-# TODO:  does this script still serve a purpose?  Writing this in 2005,
-# "old btree" doesn't mean much to me.
-
-import transaction
-
-def convert(old, new, threshold=200, f=None):
-    "Utility for converting old btree to new"
-    n=0
-    for k, v in old.items():
-        if f is not None: v=f(v)
-        new[k]=v
-        n=n+1
-        if n > threshold:
-            transaction.savepoint()
-            old._p_jar.cacheMinimize()
-            n=0
-
-    transaction.savepoint()
-    old._p_jar.cacheMinimize()