You don't even need expensive software to do that sort of thing, you can get it all done with a free program like Audacity. All you have to do is (when dealing with stereo at least) mix the left track with the inverted right track. Granted this won't be perfect, but it will accomplish it just as well as programs like Adobe Audition.
Actually it won't. Audition's center channel extractor works in a completely different way, and actually leaves the remaining stereo field intact, as well as doing a better overall job of center channel removal than the old subtractive method - which it's also quite capable of.
I suggest that before making any other silly comments like the above, that you actually find out what Audition is capable of - clearly rather more than you think.