Removing dependencies from pkg into Docker internal code

Closes #10922

Signed-off-by: Srini Brahmaroutu <srbrahma@us.ibm.com>
Upstream-commit: 7a9c944b827dc0cd416d701fe6460264f05166bb
Component: engine

components/engine/utils/utils.go

@@ -3,7 +3,6 @@ package utils
 import (
 	"bufio"
 	"bytes"
-	"crypto/rand"
 	"crypto/sha1"
 	"crypto/sha256"
 	"encoding/hex"
@@ -16,7 +15,6 @@ import (
 	"path/filepath"
 	"regexp"
 	"runtime"
-	"strconv"
 	"strings"
 	"sync"
 
@@ -164,36 +162,6 @@ func GetTotalUsedFds() int {
 	return -1
 }
 
-// TruncateID returns a shorthand version of a string identifier for convenience.
-// A collision with other shorthands is very unlikely, but possible.
-// In case of a collision a lookup with TruncIndex.Get() will fail, and the caller
-// will need to use a langer prefix, or the full-length Id.
-func TruncateID(id string) string {
-	shortLen := 12
-	if len(id) < shortLen {
-		shortLen = len(id)
-	}
-	return id[:shortLen]
-}
-
-// GenerateRandomID returns an unique id
-func GenerateRandomID() string {
-	for {
-		id := make([]byte, 32)
-		if _, err := io.ReadFull(rand.Reader, id); err != nil {
-			panic(err) // This shouldn't happen
-		}
-		value := hex.EncodeToString(id)
-		// if we try to parse the truncated for as an int and we don't have
-		// an error then the value is all numberic and causes issues when
-		// used as a hostname. ref #3869
-		if _, err := strconv.ParseInt(TruncateID(value), 10, 64); err == nil {
-			continue
-		}
-		return value
-	}
-}
-
 func ValidateID(id string) error {
 	if ok := validHex.MatchString(id); !ok {
 		err := fmt.Errorf("image ID '%s' is invalid", id)