remove duplicate commands in main

kube was erronously being added as main subcommand multiple
times. it should not be a subcommand as it should live under
either play or generate.

also removing the addition of the volume command from the commands.go
to eliminate a duplicate.

Signed-off-by: baude <bbaude@redhat.com>

cmd/podman/commands.go

@@ -17,7 +17,6 @@ func getMainCommands() []*cobra.Command {
 		_diffCommand,
 		_execCommand,
 		_generateCommand,
-		_containerKubeCommand,
 		_playCommand,
 		_psCommand,
 		_loginCommand,
@@ -39,7 +38,6 @@ func getMainCommands() []*cobra.Command {
 		_topCommand,
 		_umountCommand,
 		_unpauseCommand,
-		volumeCommand.Command,
 		_waitCommand,
 	}