register: add ListName option

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

README.md

@@ -1,5 +1,5 @@
 # Micro 
-![Coverage](https://img.shields.io/badge/Coverage-44.8%25-yellow)
+![Coverage](https://img.shields.io/badge/Coverage-45.1%25-yellow)
 
 Micro is a standard library for microservices.
 

register/options.go

@@ -5,7 +5,6 @@ import (
 	"crypto/tls"
 	"time"
 
-	"go.unistack.org/micro/v3/codec"
 	"go.unistack.org/micro/v3/logger"
 	"go.unistack.org/micro/v3/meter"
 	"go.unistack.org/micro/v3/tracer"
@@ -27,8 +26,6 @@ type Options struct {
 	Name string
 	// Addrs specifies register addrs
 	Addrs []string
-	// Codec used to marshal/unmarshal data in register
-	Codec codec.Codec
 	// Timeout specifies timeout
 	Timeout time.Duration
 }
@@ -40,7 +37,6 @@ func NewOptions(opts ...Option) Options {
 		Meter:   meter.DefaultMeter,
 		Tracer:  tracer.DefaultTracer,
 		Context: context.Background(),
-		Codec:   codec.NewCodec(),
 	}
 	for _, o := range opts {
 		o(&options)
@@ -314,11 +310,3 @@ func Name(n string) Option {
 		o.Name = n
 	}
 }
-
-type codecKey struct{}
-
-func Codec(c codec.Codec) Option {
-	return func(o *Options) {
-		o.Codec = c
-	}
-}