repository: drop unused rjoin() method

This method was introduced by cfeeac24fc1e but grepping the history does not
reveal any call. Extensions may use it but the method intent is not even clear
to me.

mercurial/localrepo.py

@@ -482,9 +482,6 b' class localrepository(repo.repository):'
     def wjoin(self, f):
         return os.path.join(self.root, f)
 
-    def rjoin(self, f):
-        return os.path.join(self.root, util.pconvert(f))
-
     def file(self, f):
         if f[0] == '/':
             f = f[1:]

mercurial/repo.py

@@ -35,10 +35,3 b' class repository(object):'
 
     def cancopy(self):
         return self.local()
-
-    def rjoin(self, path):
-        url = self.url()
-        if url.endswith('/'):
-            return url + path
-        else:
-            return url + '/' + path