diff -r 729082bb9938 -r 655b5b465953 mercurial/revlogutils/constants.py
--- a/mercurial/revlogutils/constants.py	Thu Aug 16 02:08:13 2018 +0200
+++ b/mercurial/revlogutils/constants.py	Thu Aug 16 02:53:42 2018 +0200
@@ -41,6 +41,3 @@
 REVIDX_KNOWN_FLAGS = util.bitsfrom(REVIDX_FLAGS_ORDER)
 # bitmark for flags that could cause rawdata content change
 REVIDX_RAWTEXT_CHANGING_FLAGS = REVIDX_ISCENSORED | REVIDX_EXTSTORED
-
-# maximum <delta-chain-data>/<revision-text-length> ratio
-LIMIT_DELTA2TEXT = 2