Code cleanup

pubsub.go

@@ -3,7 +3,6 @@ package redis
 import (
 	"fmt"
 	"net"
-	"sync"
 	"time"
 
 	"github.com/go-redis/redis/internal"
@@ -17,7 +16,6 @@ type PubSub struct {
 	base baseClient
 	cmd  *Cmd
 
-	mu       sync.Mutex
 	channels []string
 	patterns []string
 }