data: remove unused Nodes type

internal/data/node.go

@@ -114,13 +114,6 @@ type Node struct {
 	Path string `json:"-"`
 }
 
-// Nodes is a slice of nodes that can be sorted.
-type Nodes []*Node
-
-func (n Nodes) Len() int           { return len(n) }
-func (n Nodes) Less(i, j int) bool { return n[i].Name < n[j].Name }
-func (n Nodes) Swap(i, j int)      { n[i], n[j] = n[j], n[i] }
-
 func (node Node) String() string {
 	var mode os.FileMode
 	switch node.Type {