Deps: Switch to `bitreq-0.3.5` and remove duplicates

[hydra-yse]

bitreq-0.3.5 has been released, so we can now move off of https://github.com/breez/corepc.
As part of their update, they also bumped other crates, see rust-bitcoin/corepc#560, so it would be a good idea to remove all duplicate sub-crates as well.