diff --git a/src/utils/typeUtils.js b/src/utils/typeUtils.js
index c11efcf..5cd6766 100644
--- a/src/utils/typeUtils.js
+++ b/src/utils/typeUtils.js
@@ -1,24 +1,4 @@
 
-export function isString(x) {
-    return x && Object.prototype.toString.call(x) === '[object String]';
-}
-
-export function isClass(v) {
-    return typeof v === 'function' && /^\s*class\s+/.test(v.toString());
-}
-
 export function isFunction(x) {
     return x && Object.prototype.toString.call(x) === '[object Function]';
 }
-
-export function isEmpty(x) {
-    return x && x.constructor === Object && Object.keys(x).length === 0;
-}
-
-export function isObject(x) {
-    return x && Object.prototype.toString.call(x) === '[object Object]';
-}
-
-export function isArray(x) {
-    return x && Object.prototype.toString.call(x) === '[object Array]';
-}