Disable notifications from Google assist when near train stations

[AC Question]

Android dropped the balls for me here. I am far from a newbie when it comes to android, but I can't find anywhere to disable this thing. Whenever I am near a train station, it prompts me with the boarding times. I don't need that. How do I tell it to shut the..... up about that.
It was so easy to do in Google now. Why not here. Am I missing something?