[#460] services/util: Remove HandleServerStreamRequest

There is no need in a wrapper with many from-`interface{}` conversions.

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>

pkg/services/util/response/server_stream.go

@@ -1,37 +0,0 @@
-package response
-
-import (
-	"fmt"
-
-	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/util"
-)
-
-// ServerMessageStreamer represents server-side message streamer
-// that sets meta values to all response messages.
-type ServerMessageStreamer struct {
-	srv *Service
-
-	recv util.ResponseMessageReader
-}
-
-// Recv calls Recv method of internal streamer, sets response meta
-// values and returns the response.
-func (s *ServerMessageStreamer) Recv() (util.ResponseMessage, error) {
-	m, err := s.recv()
-	if err != nil {
-		return nil, fmt.Errorf("could not receive response message for signing: %w", err)
-	}
-
-	s.srv.SetMeta(m)
-
-	return m, nil
-}
-
-// HandleServerStreamRequest builds internal streamer via handlers, wraps it to ServerMessageStreamer and returns the result.
-func (s *Service) HandleServerStreamRequest(respWriter util.ResponseMessageWriter) util.ResponseMessageWriter {
-	return func(resp util.ResponseMessage) error {
-		s.SetMeta(resp)
-
-		return respWriter(resp)
-	}
-}