orderedlazyset: directly use __contains__ instead of a lambda

We apply the same speedup as in spanset, getting rid of the useless lambda.
(No new timing, as this is the very same change)

mercurial/revset.py

@@ -2419,7 +2419,7 b' class orderedlazyset(_orderedsetmixin, l'
             self.reverse()
 
     def __and__(self, x):
-        return orderedlazyset(self, lambda r: r in x,
+        return orderedlazyset(self, x.__contains__,
                 ascending=self._ascending)
 
     def __sub__(self, x):