Merge pull request kubernetes#76662 from stuart-mclaren/version-fix

Fix kubectl version --client=true

Author: k8s-ci-robot

pkg/kubectl/cmd/version/version.go

@@ -88,6 +88,9 @@ func NewCmdVersion(f cmdutil.Factory, ioStreams genericclioptions.IOStreams) *co
 // Complete completes all the required options
 func (o *Options) Complete(f cmdutil.Factory, cmd *cobra.Command) error {
 	var err error
+	if o.ClientOnly {
+		return nil
+	}
 	o.discoveryClient, err = f.ToDiscoveryClient()
 	// if we had an empty rest.Config, continue and just print out client information.
 	// if we had an error other than being unable to build a rest.Config, fail.