remove deprecated wrappers
Some wrappers are not required anymore. We should refactor the code. E.g. UnitializedProposalWrapper can be removed. Furthermore, hopsy::ProposalWrapper can be removed and replace by type specialization in hops.
Some wrappers are not required anymore. We should refactor the code. E.g. UnitializedProposalWrapper can be removed. Furthermore, hopsy::ProposalWrapper can be removed and replace by type specialization in hops.