Fix the comment for daemon/logger.Copier

Now daemon/logger.Copier does not use ContainerID

Addendum to #23141

Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>
Upstream-commit: 518709a87e04f55babc5162861aa4ba9a423f0c8
Component: engine

components/engine/daemon/logger/copier.go

@@ -10,8 +10,7 @@ import (
 	"github.com/Sirupsen/logrus"
 )
 
-// Copier can copy logs from specified sources to Logger and attach
-// ContainerID and Timestamp.
+// Copier can copy logs from specified sources to Logger and attach Timestamp.
 // Writes are concurrent, so you need implement some sync in your logger
 type Copier struct {
 	// srcs is map of name -> reader pairs, for example "stdout", "stderr"