The tahoe-lafs package is removed from Bullseye due to missing python3
support. The package may be reintroduced later.
I think the app can simply be disabled, because in Buster it was
marked as Advanced, and not really usable anyway.
Closes: #1856.
Signed-off-by: James Valleroy <jvalleroy@mailbox.org>
Reviewed-by: Sunil Mohan Adapa <sunil@medhas.org>