Cleanup duplication in daemon files

Signed-off-by: Bily Zhang <xcoder@tenxcloud.com>

daemon/graphdriver/lcow/lcow.go

@@ -751,7 +751,7 @@ func (d *Driver) Cleanup() error {
 
 	// Note we don't return an error below - it's possible the files
 	// are locked. However, next time around after the daemon exits,
-	// we likely will be able to to cleanup successfully. Instead we log
+	// we likely will be able to cleanup successfully. Instead we log
 	// warnings if there are errors.
 	for _, item := range items {
 		if item.IsDir() && strings.HasSuffix(item.Name(), "-removing") {

daemon/graphdriver/windows/windows.go

@@ -456,7 +456,7 @@ func (d *Driver) Cleanup() error {
 
 	// Note we don't return an error below - it's possible the files
 	// are locked. However, next time around after the daemon exits,
-	// we likely will be able to to cleanup successfully. Instead we log
+	// we likely will be able to cleanup successfully. Instead we log
 	// warnings if there are errors.
 	for _, item := range items {
 		if item.IsDir() && strings.HasSuffix(item.Name(), "-removing") {

daemon/logger/awslogs/cloudwatchlogs.go

@@ -288,7 +288,7 @@ func newAWSLogsClient(info logger.Info) (api, error) {
 
 	sess, err := session.NewSession()
 	if err != nil {
-		return nil, errors.New("Failed to create a service client session for for awslogs driver")
+		return nil, errors.New("Failed to create a service client session for awslogs driver")
 	}
 
 	// attach region to cloudwatchlogs config

daemon/logger/logger.go

@@ -103,7 +103,7 @@ type LogReader interface {
 type LogWatcher struct {
 	// For sending log messages to a reader.
 	Msg chan *Message
-	// For sending error messages that occur while while reading logs.
+	// For sending error messages that occur while reading logs.
 	Err          chan error
 	producerOnce sync.Once
 	producerGone chan struct{}