diff --git a/mercurial/util.py b/mercurial/util.py
--- a/mercurial/util.py
+++ b/mercurial/util.py
@@ -1586,8 +1586,6 @@ def increasingchunks(source, min=1024, m
     if buf:
         yield ''.join(buf)
 
-Abort = error.Abort
-
 def always(fn):
     return True