diff --git a/src/core/plugins/err/error-transformers/hook.js b/src/core/plugins/err/error-transformers/hook.js
index fa99ab35..e33dbb6f 100644
--- a/src/core/plugins/err/error-transformers/hook.js
+++ b/src/core/plugins/err/error-transformers/hook.js
@@ -34,10 +34,3 @@ export default function transformErrors (errors, system) {
     })
 
 }
-
-function toTitleCase(str) {
-  return str
-    .split("-")
-    .map(substr => substr[0].toUpperCase() + substr.slice(1))
-    .join("")
-}