diff --git a/node_group.go b/node_group.go
deleted file mode 100644
index cfd2fde..0000000
--- a/node_group.go
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
- * Copyright (c) 2015 Alex Yatskov <alex@foosoft.net>
- * Author: Alex Yatskov <alex@foosoft.net>
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy of
- * this software and associated documentation files (the "Software"), to deal in
- * the Software without restriction, including without limitation the rights to
- * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
- * the Software, and to permit persons to whom the Software is furnished to do so,
- * subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
- * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
- * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-package main
-
-//
-//	versionNodeGroup
-//
-
-type versionNodeGroup struct {
-	nodes []*versionedNode
-}
-
-func (this *versionNodeGroup) latest() *versionedNode {
-	if length := len(this.nodes); length > 0 {
-		return this.nodes[length-1]
-	}
-
-	return nil
-}
-
-func (this *versionNodeGroup) version(path string, ver *version) error {
-	node, err := newVersionedNode(path, ver)
-	if err != nil {
-		return err
-	}
-
-	this.nodes = append(this.nodes, node)
-	return nil
-}