Issue #3519266 by tom konda: Remove IE7 support from Drupal.url.toAbsolute()

core/misc/drupal.js

@@ -404,7 +404,6 @@ window.Drupal = { behaviors: {}, locale: {} };
    *
    * @see https://github.com/angular/angular.js/blob/v1.4.4/src/ng/urlUtils.js
    * @see https://grack.com/blog/2009/11/17/absolutizing-url-in-javascript
-   * @see https://github.com/jquery/jquery-ui/blob/1.11.4/ui/tabs.js#L53
    */
   Drupal.url.toAbsolute = function (url) {
     const urlParsingNode = document.createElement('a');
@@ -419,9 +418,7 @@ window.Drupal = { behaviors: {}, locale: {} };
 
     urlParsingNode.setAttribute('href', url);
 
-    // IE <= 7 normalizes the URL when assigned to the anchor node similar to
-    // the other browsers.
-    return urlParsingNode.cloneNode(false).href;
+    return urlParsingNode.href;
   };
 
   /**