message: network-core: Remove the Sized bound from server::Node
  A compiler error during some frantic hacking suggested that the bound
  needs to be present, but after all is done, it's not required.
diff: @@ -8,7 +8,7 @@ pub mod transaction;
  /// An implementation of a blockchain node implements this trait to
  /// serve the network protocols using node's subsystems such as
  /// block storage and transaction engine.
  -pub trait Node: Sized {
  +pub trait Node {
  /// The implementation of the block service.
  type BlockService: block::BlockService;
  