Just to clarify: ice isn't double SE into Dragon. Ice is double SE into Dragonite because he is Dargon/Flying type (which both are weak to ice)
But to answer your question. I agree, I don't see a point in keeping that move. (Unless maybe it becomes better in the next move rework, but who knows when that will hapen, and if you've only got one good Lapras, you might not want to wait for that)