cli/command: remove deprecated DockerCli.DefaultVersion

This function was used internally, but is no longer used.

This method was deprecated in 0270b2d,
which was included in the 28.5.0 release, and has no known external users,
so removing it for 29.0

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

Author: thaJeztah

cli/command/cli.go

@@ -85,13 +85,6 @@ type DockerCli struct {
 	enableGlobalMeter, enableGlobalTracer bool
 }
 
-// DefaultVersion returns [client.MaxAPIVersion].
-//
-// Deprecated: this function is no longer used and will be removed in the next release.
-func (*DockerCli) DefaultVersion() string {
-	return client.MaxAPIVersion
-}
-
 // CurrentVersion returns the API version currently negotiated, or the default
 // version otherwise.
 func (cli *DockerCli) CurrentVersion() string {