diff -r 25b37900d6e0 -r 3f5d675fddf4 mercurial/policy.py
--- a/mercurial/policy.py	Tue May 02 21:45:10 2017 +0900
+++ b/mercurial/policy.py	Tue May 02 21:45:48 2017 +0900
@@ -22,8 +22,6 @@
 # run without recompiling the C extensions. This will be overridden by
 # __modulepolicy__ generated by setup.py.
 policy = b'allow'
-policynoc = (b'cffi', b'cffi-allow', b'py')
-policynocffi = (b'c', b'py')
 _packageprefs = {
     # policy: (versioned package, pure package)
     b'c': (r'cext', None),