🔥 Remove unused functions

This change removes unused utility functions that were accidentally
included in ottypes#40

Author: alecgibson

lib/json0.js

@@ -45,16 +45,6 @@ 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 {*}