config/default: minor changes

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

config/default.go

@@ -274,7 +274,7 @@ func (c *defaultConfig) Watch(ctx context.Context, opts ...WatchOption) (Watcher
 	w := &defaultWatcher{
 		opts:  c.opts,
 		wopts: NewWatchOptions(opts...),
-		done:  make(chan bool),
+		done:  make(chan struct{}),
 		vchan: make(chan map[string]interface{}),
 		echan: make(chan error),
 	}
@@ -296,8 +296,7 @@ func NewConfig(opts ...Option) Config {
 type defaultWatcher struct {
 	opts  Options
 	wopts WatchOptions
-	done   chan bool
-	ticker *time.Ticker
+	done  chan struct{}
 	vchan chan map[string]interface{}
 	echan chan error
 }