so, i found a custom subeta profile on this blog, popped it in, and i can't seem to remove the widget that came with it

does anyone know how?

what do you mean by "the widget that came with it"? if you clear your profile code (this page), you should be able to add & remove any widgets and then add the custom code back in. however, in order for the custom profile to be visible, you do need the "profile" widget present on your profile; you can use it as a bio/about by typing whatever you want outside the style tags.