Reverting 18442

pkg/kubectl/cmd/explain.go

@@ -84,7 +84,7 @@ func RunExplain(f *cmdutil.Factory, out io.Writer, cmd *cobra.Command, args []st
 	}
 
 	// TODO: We should deduce the group for a resource by discovering the supported resources at server.
-	gvk, err := mapper.KindFor(unversioned.GroupVersionResource{Resource: inModel})
+	gvk, err := mapper.KindFor(inModel)
 	if err != nil {
 		return err
 	}