Remove unused Voter methods
Remove unused Voter methods

AFAIK these methods were never used. In any case, the similar method
`set_demographic_info` was added in commit 6c34599e.

consul/consul,usabi/consul_san_borondon,consul/consul,usabi/consul_san_borondon,consul/consul,consul/consul,consul/consul,usabi/consul_san_borondon,usabi/consul_san_borondon