If you don't have a video card in your computer, you won't be able to recieve output from the monitor. It won't hurt it any if you take out the video card. It will try to boot up as usual, but may give you beeps and error codes because of the missing video card. That's no big deal. The next time you put in a new video card, it will boot up just fine.
Ok, so if you want to get rid of the video card, yeah, go into the Control Panel, Add/Remove programs and find the Display Adapter. Uninstall that and you're all set.