resolve some small issues

pkg/upstream/stack/stack.go

@@ -486,7 +486,7 @@ If a service is failing to even start, try smoke out the error with:
 	}
 }
 
-// FIXME: Copypasta from https://github.com/docker/cli/blob/master/cli/command/stack/swarm/list.go because I could't import "github.com/docker/cli/cli/command/stack/swarm"
+// Copypasta from https://github.com/docker/cli/blob/master/cli/command/stack/swarm/list.go
 // GetStacks lists the swarm stacks.
 func GetStacks(cl *dockerClient.Client) ([]*formatter.Stack, error) {
 	services, err := cl.ServiceList(