Remove deprecated cli flags

Signed-off-by: Antonio Murdaca <runcom@redhat.com>
Upstream-commit: 7929888214741c4ab194c44e0b14ac08aca06556
Component: engine

components/engine/docker/daemon_none.go

@@ -8,9 +8,6 @@ const daemonUsage = ""
 
 var daemonCli cli.Handler
 
-// TODO: remove once `-d` is retired
-func handleGlobalDaemonFlag() {}
-
 // notifySystem sends a message to the host when the server is ready to be used
 func notifySystem() {
 }