diff --git a/lib/manager/docker/extract.js b/lib/manager/docker/extract.js
index 179480acfde9e650c76c2149e16f3fd656c8026a..157be3ca90cec3ff6fa1fa1e79d57d6c036ace90 100644
--- a/lib/manager/docker/extract.js
+++ b/lib/manager/docker/extract.js
@@ -1,6 +1,4 @@
 module.exports = {
-  splitImageParts,
-  getPurl,
   getDep,
   extractDependencies,
 };