revset-rangeset: remove usage of `set()`

All smartset classes have fast lookup, so this function will be removed soon.

mercurial/revset.py

@@ -282,8 +282,7 b' def rangeset(repo, subset, x, y):'
 def dagrange(repo, subset, x, y):
     r = spanset(repo)
     xs = _revsbetween(repo, getset(repo, r, x), getset(repo, r, y))
-    s = subset.set()
-    return xs.filter(s.__contains__)
+    return xs & subset
 
 def andset(repo, subset, x, y):
     return getset(repo, getset(repo, subset, x), y)