Remove some references to "register" through login

These were left-overs from the now deprecated
and removed functionality to registrer a new account
through "docker login"

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Upstream-commit: 38f2513340
Component: cli

components/cli/common.go

@@ -42,7 +42,7 @@ var dockerCommands = []Command{
 	{"inspect", "Return low-level information on a container or image"},
 	{"kill", "Kill a running container"},
 	{"load", "Load an image from a tar archive or STDIN"},
-	{"login", "Register or log in to a Docker registry"},
+	{"login", "Log in to a Docker registry"},
 	{"logout", "Log out from a Docker registry"},
 	{"logs", "Fetch the logs of a container"},
 	{"network", "Manage Docker networks"},