Unfortunately, no. AresMUSH is designed to work as a cohesive whole with both the web portal and client side. There is no way to use one without the other. Even if you hid mention of it on the home page (which would require custom code; there is no way to turn it off), it would still be there and players would be able to connect. References to the game side are pervasive, from the help files to the way character icons are displayed on the portal.
What sort of information would you want for player bits? They’re really just dummy characters for emitting or consolidating chats, and most players don’t really bother using one. (They’re actually most useful on a MUSH client so you can have an ‘ooc-only’ client window, so that would seem to run counter to your goals anyway.)