cli/command: remove deprecated RegistryClient from CLI interface

This method was a shallow wrapper around registryclient.NewRegistryClient but
due to its signature resulted in various dependencies becoming a dependency
of the "command" package. Consequence of this was that cli-plugins, which
need the cli/command package, would also get those dependencies. It is no
longer used, and was deprecated in 8ad0721.

This patch removes the RegistryClient method from the interface

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Author: thaJeztah

cli/command/cli.go

@@ -56,7 +56,6 @@ type Cli interface {
 	CurrentContext() string
 	DockerEndpoint() docker.Endpoint
 	TelemetryClient
-	DeprecatedManifestClient
 }
 
 // DockerCli is an instance the docker command line client.