diff -r 4eb3bf227ce7 -r 71f189941791 mercurial/hbisect.py
--- a/mercurial/hbisect.py	Tue Mar 06 07:11:24 2018 -0600
+++ b/mercurial/hbisect.py	Tue Mar 06 07:15:01 2018 -0600
@@ -267,12 +267,6 @@
 
     return None
 
-def shortlabel(label):
-    if label:
-        return label[0].upper()
-
-    return None
-
 def printresult(ui, repo, state, displayer, nodes, good):
     if len(nodes) == 1:
         # narrowed it down to a single revision