If you want to have your ROS somewhere else in the garden, I find that it is easy to make cuttings. These could be planted where you want them to be. Then you could remove the original troublesome bush. IF you want to kill it, there are some herbicides out there that will certainly take care of it. Round up works wonders on killing the plant, as does straight javex.

When I was young, I recall my dad wanted to have the city remove a dying maple tree from the city boulevard, and they refused because it was not dead enough. A few copper nails worked wonders, and the next year they removed a completely dead tree, as he smiled from inside the house.