--- a/mercurial/fileset.py	Sat Jul 21 16:11:36 2018 +0900
+++ b/mercurial/fileset.py	Sat Jul 21 16:13:30 2018 +0900
@@ -438,7 +438,6 @@
     'minus': minusmatch,
     'negate': negatematch,
     'list': listmatch,
-    'group': getmatch,
     'not': notmatch,
     'func': func,
 }