I did some checks on this for you, however i'm not able to find a solution that would remove the map markers.
I've checked on the list of available functions that Google maps provides but there aren't any that can modify the map class Type style after its initiated.
What I can do however is to check with our 2nd tier supporters to see if they can think of a solution for this one.
Once i've gotten an update from them I will let you know.