--- a/mercurial/scmutil.py	Mon Nov 12 00:48:11 2018 +0100
+++ b/mercurial/scmutil.py	Mon Nov 12 01:42:03 2018 +0100
@@ -1450,8 +1450,7 @@
     """
     # experimental config: format.generaldelta
     return (ui.configbool('format', 'generaldelta')
-            or ui.configbool('format', 'usegeneraldelta')
-            or ui.configbool('format', 'sparse-revlog'))
+            or ui.configbool('format', 'usegeneraldelta'))
 
 def gddeltaconfig(ui):
     """helper function to know if incoming delta should be optimised