It was just there in "Add/Remove Programs" on both my machines. They both had Photoshop on as well, though, so that might have been what put the uninstall there if Audition didn't.
I think that is the case - the Bridge uninstaller isn't on the machine that has only Audition on it here. I'm afraid that the standalone install disc is rather screwed from this POV - you really
shouldn't allow the installation of an entire app or two with hooks into the registry, etc without an uninstaller, should you? Naughty Adobe...