diff --git a/core/modules/utils/linked-list.js b/core/modules/utils/linked-list.js
index 8d7f44676..ca041f7a8 100644
--- a/core/modules/utils/linked-list.js
+++ b/core/modules/utils/linked-list.js
@@ -16,8 +16,8 @@ function LinkedList() {
 
 LinkedList.prototype.clear = function() {
 	// LinkedList performs the duty of both the head and tail node
-	this.next = new LLMap();
-	this.prev = new LLMap();
+	this.next = new Map();
+	this.prev = new Map();
 	// Linked list head initially points to itself
 	this.next.set(null, null);
 	this.prev.set(null, null);
@@ -190,18 +190,4 @@ function _assertString(value) {
 	}
 };
 
-var LLMap = function() {
-	this.map = Object.create(null);
-};
-
-// Just a wrapper so our object map can also accept null.
-LLMap.prototype = {
-	set: function(key,val) {
-		(key === null) ? (this.null = val) : (this.map[key] = val);
-	},
-	get: function(key) {
-		return (key === null) ? this.null : this.map[key];
-	}
-};
-
 exports.LinkedList = LinkedList;