cli/command: deprecate DockerCli.DefaultVersion

This function was used internally, but is no longer used. There are
no known users of this method, so already removing it from the Cli
interface.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit 0270b2d6f7)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

cli/command/cli.go

@@ -48,7 +48,6 @@ type Cli interface {
 	Apply(ops ...CLIOption) error
 	config.Provider
 	ServerInfo() ServerInfo
-	DefaultVersion() string
 	CurrentVersion() string
 	ContentTrustEnabled() bool
 	BuildKitEnabled() (bool, error)
@@ -90,6 +89,8 @@ type DockerCli struct {
 }
 
 // DefaultVersion returns [api.DefaultVersion].
+//
+// Deprecated: this function is no longer used and will be removed in the next release.
 func (*DockerCli) DefaultVersion() string {
 	return api.DefaultVersion
 }