deprecate cli/command/stack/swarm

Functions and types in this package were exported as part of the "compose
on kubernetes" feature, which was deprecated and removed. These functions
are meant for internal use, and will be removed in the next release.

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

cli/command/stack/swarm/ps.go

@@ -12,6 +12,8 @@ import (
 )
 
 // RunPS is the swarm implementation of docker stack ps
+//
+// Deprecated: this function was for internal use and will be removed in the next release.
 func RunPS(ctx context.Context, dockerCLI command.Cli, opts options.PS) error {
 	filter := getStackFilterFromOpt(opts.Namespace, opts.Filter)