--- a/mercurial/repository.py	Fri Sep 28 09:28:38 2018 -0700
+++ b/mercurial/repository.py	Fri Sep 28 09:33:05 2018 -0700
@@ -545,12 +545,6 @@
         Any metadata is excluded from size measurements.
         """
 
-    def checkhash(fulltext, node, p1=None, p2=None, rev=None):
-        """Validate the stored hash of a given fulltext and node.
-
-        Raises ``error.StorageError`` is hash validation fails.
-        """
-
     def revision(node, raw=False):
         """"Obtain fulltext data for a node.