diff --git a/lib/json0.js b/lib/json0.js
index a93ffe4..9f538ee 100644
--- a/lib/json0.js
+++ b/lib/json0.js
@@ -43,16 +43,6 @@ var clone = function(o) {
   return JSON.parse(JSON.stringify(o));
 };
 
-var validateListIndex = function(key) {
-  if (typeof key !== 'number')
-    throw new Error('List index must be a number');
-};
-
-var validateObjectKey = function (key) {
-  if (typeof key !== 'string')
-    throw new Error('Object key must be a number');
-};
-
 /**
  * JSON OT Type
  * @type {*}