diff -r c00005975c91 -r ef177c04ac7f mercurial/revlog.py
--- a/mercurial/revlog.py	Mon Aug 19 10:34:10 2019 -0700
+++ b/mercurial/revlog.py	Mon Aug 19 16:14:27 2019 +0200
@@ -1677,7 +1677,7 @@
 
         return text
 
-    def rawdata(self, nodeorrev, _df=None, raw=False):
+    def rawdata(self, nodeorrev, _df=None):
         """return an uncompressed raw data of a given node or revision number.
 
         _df - an existing file handle to read from. (internal-only)