removed tree package

internal/tree/node.go

@@ -1,50 +0,0 @@
-package tree
-
-// Node is a struct containing nodes of a file tree.
-type Node struct {
-	// can be nil
-	Parent *Node
-	Name   string
-	// Empty value mean directory
-	Ext string
-	// cannot be nil; may have len 0
-	Children []*Node
-}
-
-// NewNode constructs and returns a Node instance.
-// parent and children are optional and can be nil,
-// in which case Parent will be stored as nil,
-// but Children will be initialized as []*Node of len 0.
-// If ext == "", the Node is a directory.
-func NewNode(name string, ext string, parent *Node, children []*Node) *Node {
-	var c []*Node
-	if children == nil {
-		c = make([]*Node, 0)
-	} else {
-		c = children
-	}
-	n := &Node{
-		Name:     name,
-		Ext:      ext,
-		Parent:   parent,
-		Children: c,
-	}
-	return n
-}
-
-func (n *Node) IsRoot() bool {
-	return n.Parent == nil
-}
-
-func (n *Node) IsTail() bool {
-	return len(n.Children) == 0
-}
-
-func (n *Node) IsDir() bool {
-	return n.Ext == ""
-}
-
-// TODO: Implement recursive depth-first traversal to process a tree
-
-func Traverse(root *Node) {
-}