fix: license issue in blob disk feature

vendor/github.com/rubiojr/go-vhd/vhd/util.go

@@ -1,13 +1,10 @@
 package vhd
 
 import (
-	"encoding/binary"
 	"encoding/hex"
 	"fmt"
 	"os"
 	"strings"
-	"unicode/utf16"
-	"unicode/utf8"
 )
 
 // https://groups.google.com/forum/#!msg/golang-nuts/d0nF_k4dSx4/rPGgfXv6QCoJ
@@ -55,19 +52,3 @@ func uuidToBytes(uuid string) []byte {
 
 	return h
 }
-
-/*
-	utf16BytesToString converts UTF-16 encoded bytes, in big or
- 	little endian byte order, to a UTF-8 encoded string.
- 	http://stackoverflow.com/a/15794113
-*/
-func utf16BytesToString(b []byte, o binary.ByteOrder) string {
-	utf := make([]uint16, (len(b)+(2-1))/2)
-	for i := 0; i+(2-1) < len(b); i += 2 {
-		utf[i/2] = o.Uint16(b[i:])
-	}
-	if len(b)/2 < len(utf) {
-		utf[len(utf)-1] = utf8.RuneError
-	}
-	return string(utf16.Decode(utf))
-}