progress: remove progress.estimate config It was introduced by 98e4d39 ("progress: add speed format" 2011-5-9) and was intended to hide ETA information for the first few seconds. Later 5d261fd ("progress: add a changedelay to prevent parallel topics from flapping (issue2698)" 2011-6-23) introduced `changedelay` config which hides the entire progress bar for the first few seconds. So `progress.estimate` seems somehow duplicated feature-wise. Since it's experimental and duplicated, let's just remove it. This makes the next patch simpler - it no longer needs to make sure `starttimes` is the real start time. Differential Revision: https://phab.mercurial-scm.org/D828

--- a/mercurial/configitems.py	Tue Sep 26 12:48:15 2017 -0700
+++ b/mercurial/configitems.py	Wed Sep 27 14:30:58 2017 -0700
@@ -359,9 +359,6 @@
 coreconfigitem('progress', 'disable',
     default=False,
 )
-coreconfigitem('progress', 'estimate',
-    default=2,
-)
 coreconfigitem('progress', 'refresh',
     default=0.1,
 )