favorites: don't try to suppress duplicate favorites
favorites: don't try to suppress duplicate favorites

Otherwise a user wouldn't be able to re-add a favorite without doing
an ls under private/ or public/, which might be confusing.

keybase/client,keybase/client,keybase/client,keybase/kbfs,keybase/client,keybase/client,keybase/client,keybase/client,keybase/kbfs,keybase/client,keybase/client,keybase/kbfs,keybase/client,keybase/client,keybase/kbfs,keybase/client