Removed unused err return value from NewDeviceWatcher.

cmd/demo/demo.go

@@ -51,7 +51,7 @@ func main() {
 
 	fmt.Println()
 	fmt.Println("Watching for device state changes.")
-	watcher, err := adb.NewDeviceWatcher(adb.ClientConfig{})
+	watcher := adb.NewDeviceWatcher(adb.ClientConfig{})
 	for event := range watcher.C() {
 		fmt.Printf("\t[%s]%+v\n", time.Now(), event)
 	}

device_watcher.go

@@ -36,7 +36,7 @@ type deviceWatcherImpl struct {
 	startServer func() error
 }
 
-func NewDeviceWatcher(config ClientConfig) (*DeviceWatcher, error) {
+func NewDeviceWatcher(config ClientConfig) *DeviceWatcher {
 	watcher := &DeviceWatcher{&deviceWatcherImpl{
 		config:      config.sanitized(),
 		eventChan:   make(chan DeviceStateChangedEvent),
@@ -49,7 +49,7 @@ func NewDeviceWatcher(config ClientConfig) (*DeviceWatcher, error) {
 
 	go publishDevices(watcher.deviceWatcherImpl)
 
-	return watcher, nil
+	return watcher
 }
 
 /*

host_client.go

@@ -14,7 +14,6 @@ Eg.
 	client := NewHostClient()
 	client.StartServer()
 	client.ListDevices()
-	client.GetAnyDevice() // see DeviceClient
 
 See list of services at https://android.googlesource.com/platform/system/core/+/master/adb/SERVICES.TXT.
 */
@@ -23,21 +22,6 @@ type HostClient struct {
 	config ClientConfig
 }
 
-// func NewHostClient() (*HostClient, error) {
-// 	return NewHostClientPort(AdbPort)
-// }
-
-// func NewHostClientPort(port int) (*HostClient, error) {
-// 	return NewHostClientDialer(wire.NewDialer("localhost", port))
-// }
-
-// func NewHostClientDialer(d wire.Dialer) (*HostClient, error) {
-// 	if d == nil {
-// 		return nil, errors.New("dialer cannot be nil.")
-// 	}
-// 	return &HostClient{d}, nil
-// }
-
 func NewHostClient(config ClientConfig) *HostClient {
 	return &HostClient{config.sanitized()}
 }