DD still gets a cup of milk before bed (about 1hr before, sometimes just before brushing teeth). I don't see a problem with this. However are you concern because she is taking too much milk? How is she eating? If you think that she is using milk as a meal then maybe try giving her a snack with a little bit of milk. When dd was younger, she would take her milk in bed as we read stories. To break the habit, I started to give her the milk earlier and downstairs as we read books or play board games. It took about a week or so and she was fine with it.
HTH