diff --git a/grpc.go b/grpc.go
index b8294f6..4549c7a 100644
--- a/grpc.go
+++ b/grpc.go
@@ -10,7 +10,6 @@ import (
 	"slices"
 	"sort"
 	"strconv"
-	"strings"
 	"sync"
 	"sync/atomic"
 	"time"
@@ -19,7 +18,7 @@ import (
 	reflectionv1pb "google.golang.org/grpc/reflection/grpc_reflection_v1"
 
 	// nolint: staticcheck
-	"go.unistack.org/micro/v4/codec"
+
 	"go.unistack.org/micro/v4/errors"
 	"go.unistack.org/micro/v4/logger"
 	"go.unistack.org/micro/v4/metadata"
@@ -519,21 +518,6 @@ func (g *Server) processStream(ctx context.Context, stream grpc.ServerStream, se
 	return status.New(statusCode, statusDesc).Err()
 }
 
-func (g *Server) newCodec(ct string) (codec.Codec, error) {
-	g.RLock()
-	defer g.RUnlock()
-
-	if idx := strings.IndexRune(ct, ';'); idx >= 0 {
-		ct = ct[:idx]
-	}
-
-	if c, ok := g.opts.Codecs[ct]; ok {
-		return c, nil
-	}
-
-	return nil, codec.ErrUnknownContentType
-}
-
 func (g *Server) Options() server.Options {
 	g.RLock()
 	opts := g.opts