remove from word lists

I guess it's not possible to remove words from the personal and session 
word lists, right? When I try the remove method   on a personal word 
list from a Speller instance it comes back with

The method "remove" is unimplemented in "WritableDict"

Or am I missing something? Can you give me any advice on how implement 
the remove method? Or (even better :-)) when is it going to implemented 
in the main code base?

Thank you!

-- Anton

P.S. please cc to my address, I'm not subscribed to the list. thanks