The map you see on your itinerary is generated by the addresses of your Places that will appear on your Trip Overview Map. If you want to remove the map you can do this in Trip Details box and choose "Disable" to remove the Trip Overview Map.
1. First, click on the title of your trip to open the Trip Details box.
2. Next, navigate to "Overview Map" and choose "Disabled" to remove the Trip Overview Map on an itinerary.