[#411] Remove unnecessary pointers for sync objects

Signed-off-by: Alejandro Lopez <a.lopez@yadro.com>

pkg/morph/subscriber/subscriber.go

@@ -42,7 +42,7 @@ type (
 	}
 
 	subscriber struct {
-		*sync.RWMutex
+		sync.RWMutex
 		log    *logger.Logger
 		client *client.Client
 
@@ -163,7 +163,6 @@ func New(ctx context.Context, p *Params) (Subscriber, error) {
 	}
 
 	sub := &subscriber{
-		RWMutex:    new(sync.RWMutex),
 		log:        p.Log,
 		client:     p.Client,
 		notifyChan: make(chan *state.ContainedNotificationEvent),