If you have call vectoring, you can put the covering user extension in a one step vector using a route-to <extension> step. Create a VDN to point to the vector and then change the coverage path to cover to the VDN instead of the extension. This will remove the call from the bridged appearance when it covers but it also removes it from the principal's phone. If what you want is the call to be removed from the bridged and not the principal's phone, unfortunatly you can not do it.
I don't have access to a switch to test the above VDN/vector solution and one thing I couldn't find in the administration documentation is if it will go to another coverage point after a VDN. The call coverage software in the Definity is really complex (I used to test Definity software for Bell Labs in another life) and you can do some strange and wonderful (and not so wonderful) things by screwing with coverage paths, call coverage groups, vectors, etc.
Hope this helps.
Leo V. Brown