diff -r 8ca9b3add033 -r 5f8450df5562 mercurial/localrepo.py
--- a/mercurial/localrepo.py	Tue May 02 02:04:55 2017 +0200
+++ b/mercurial/localrepo.py	Tue May 02 02:05:39 2017 +0200
@@ -865,11 +865,6 @@
     def pathto(self, f, cwd=None):
         return self.dirstate.pathto(f, cwd)
 
-    def _link(self, f):
-        self.ui.deprecwarn("use 'repo.wvfs.islink' instead of 'repo._link'",
-                           '4.2')
-        return self.wvfs.islink(f)
-
     def _loadfilter(self, filter):
         if filter not in self.filterpats:
             l = []