Grab it with your mouse, drag it off the dock, done.
I guess I’m not really seeing what I’m supposed to be outraged about, here. Modifying the stuff in the dock on OSX isn’t difficult or unintuitive at all? Just grab the stuff you don’t want on there and drag it out, and grab the stuff you do want on there and drag it in? It’s just using the standard desktop metaphor and interface, and you’re in no danger of breaking fragile uninstall scripts like you would be if you manually removed a program’s entry from the start menu on Windows. It really isn’t comparable at all.
