diff -r b8d0761a85c7 -r 0147a4730420 mercurial/configitems.py
--- a/mercurial/configitems.py	Wed Feb 21 16:47:39 2018 -0800
+++ b/mercurial/configitems.py	Thu Feb 22 20:04:42 2018 -0500
@@ -538,9 +538,6 @@
 coreconfigitem('experimental', 'httppostargs',
     default=False,
 )
-coreconfigitem('experimental', 'manifestv2',
-    default=False,
-)
 coreconfigitem('experimental', 'mergedriver',
     default=None,
 )