Only enable uuid generation warning when using registry handlers

Signed-off-by: Stephen J Day <stephen.day@docker.com>

context/logger.go

@@ -3,8 +3,6 @@ package context
 import (
 	"fmt"
 
-	"github.com/docker/distribution/uuid"
-
 	"github.com/Sirupsen/logrus"
 )
 
@@ -101,8 +99,3 @@ func getLogrusLogger(ctx Context, keys ...interface{}) *logrus.Entry {
 
 	return logger.WithFields(fields)
 }
-
-func init() {
-	// inject a logger into the uuid library.
-	uuid.Loggerf = GetLogger(Background()).Warnf
-}