
`std::copy` doesn't use the `_AlgPolicy` for anything other than calling itself with it, so we can just remove the argument. This also removes the need in a few other algorithms which had an `_AlgPolicy` argument only to call `copy`.
`std::copy` doesn't use the `_AlgPolicy` for anything other than calling itself with it, so we can just remove the argument. This also removes the need in a few other algorithms which had an `_AlgPolicy` argument only to call `copy`.