Ajax: Remove workaround for IE6/7

Closes jquerygh-1597
Ref #8138

Author: ChrisAntaki

src/ajax.js

@@ -10,10 +10,6 @@ define([
 ], function( jQuery, rnotwhite, nonce, rquery ) {
 
 var
-	// Document location
-	ajaxLocParts,
-	ajaxLocation,
-
 	rhash = /#.*$/,
 	rts = /([?&])_=[^&]*/,
 	rheaders = /^(.*?):[ \t]*([^\r\n]*)$/mg,
@@ -42,22 +38,13 @@ var
 	transports = {},
 
 	// Avoid comment-prolog char sequence (#10098); must appease lint and evade compression
-	allTypes = "*/".concat("*");
-
-// Support: IE6
-// Exception accessing window.location.href if document.domain is set (#8138)
-try {
-	ajaxLocation = location.href;
-} catch( e ) {
-	// Use the href attribute of an A element
-	// since IE will modify it given document.location
-	ajaxLocation = document.createElement( "a" );
-	ajaxLocation.href = "";
-	ajaxLocation = ajaxLocation.href;
-}
+	allTypes = "*/".concat( "*" ),
+
+	// Document location
+	ajaxLocation = location.href,
 
-// Segment location into parts
-ajaxLocParts = rurl.exec( ajaxLocation.toLowerCase() ) || [];
+	// Segment location into parts
+	ajaxLocParts = rurl.exec( ajaxLocation.toLowerCase() ) || [];
 
 // Base "constructor" for jQuery.ajaxPrefilter and jQuery.ajaxTransport
 function addToPrefiltersOrTransports( structure ) {