Remove some references to "register" through login
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 <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@gone.nl>

ashfall/cli,ashfall/cli,cpuguy83/cli,cpuguy83/cli,riyazdf/cli,dnephin/cli,docker/cli,allencloud/cli,e11137/cli,thaJeztah/cli,Zebrilee/cli,redpanda/cli,allencloud/cli,dnephin/cli,Zebrilee/cli,riyazdf/cli,gdevillele/cli,redpanda/cli,docker/cli,e11137/cli,thaJeztah/cli