Not remove, when it's compressed you can lose the lower end bass, you'll also find that quite often they'll include artifical 'peaks' of bass at around 60Hz, as most people dont use subwoofers.....the Epicenter sorts this all out. A CD's response is also pretty naff below around 30Hz (iirc), so again, this helps.
A friend of mine currently works in a studio and has mentioned their methods for editting the bass, hopefully this gadget will help add in some nice notes.....
Re-reading, I didnt mean take out before mastering, but during mixing and mastering, quite often the actual bass will be lost/given a false edit.
I won't know until I try it though!