diff --git a/src/event.js b/src/event.js
index 796d96210..a79552c17 100644
--- a/src/event.js
+++ b/src/event.js
@@ -101,8 +101,6 @@ function on( elem, types, selector, data, fn, one ) {
  */
 jQuery.event = {
 
-	global: {},
-
 	add: function( elem, types, handler, data, selector ) {
 
 		var handleObjIn, eventHandle, tmp,
@@ -210,9 +208,6 @@ jQuery.event = {
 			} else {
 				handlers.push( handleObj );
 			}
-
-			// Keep track of which events have ever been used, for event optimization
-			jQuery.event.global[ type ] = true;
 		}
 
 	},
diff --git a/test/data/testrunner.js b/test/data/testrunner.js
index 816b271a6..fd9bc6a49 100644
--- a/test/data/testrunner.js
+++ b/test/data/testrunner.js
@@ -80,7 +80,6 @@ QUnit.testDone( function() {
 	supportjQuery( "#qunit-fixture-iframe" ).remove();
 
 	// Reset internal jQuery state
-	jQuery.event.global = {};
 	if ( ajaxSettings ) {
 		jQuery.ajaxSettings = jQuery.extend( true, {}, ajaxSettings );
 	} else {